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1201002220 = 225115459101
BaseRepresentation
bin100011110010101…
…1101011011101100
310002200220020022201
41013211131123230
54424424032340
6315101351244
741522231125
oct10745353354
93080806281
101201002220
11566a30820
12296268524
13161a85702
14b571104c
157068779a
hex4795d6ec

1201002220 has 24 divisors (see below), whose sum is σ = 2751387408. Its totient is φ = 436728000.

The previous prime is 1201002199. The next prime is 1201002227. The reversal of 1201002220 is 222001021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1201002197 and 1201002206.

It is not an unprimeable number, because it can be changed into a prime (1201002227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2729331 + ... + 2729770.

It is an arithmetic number, because the mean of its divisors is an integer number (114641142).

Almost surely, 21201002220 is an apocalyptic number.

1201002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201002220 is an abundant number, since it is smaller than the sum of its proper divisors (1550385188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201002220 is a wasteful number, since it uses less digits than its factorization.

1201002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5459121 (or 5459119 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1201002220 is about 34655.4789319092. The cubic root of 1201002220 is about 1062.9543251031.

Adding to 1201002220 its reverse (222001021), we get a palindrome (1423003241).

The spelling of 1201002220 in words is "one billion, two hundred one million, two thousand, two hundred twenty".

Divisors: 1 2 4 5 10 11 20 22 44 55 110 220 5459101 10918202 21836404 27295505 54591010 60050111 109182020 120100222 240200444 300250555 600501110 1201002220