1013201220 has 48 divisors (see below), whose sum is σ = 2986280640. Its totient is φ = 255966336.

The previous prime is 1013201213. The next prime is 1013201251. The reversal of 1013201220 is 221023101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1013201196 and 1013201205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 443247 + ... + 445526.

It is an arithmetic number, because the mean of its divisors is an integer number (62214180).

Almost surely, 2^1013201220 is an apocalyptic number.

1013201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1013201220 is an abundant number, since it is smaller than the sum of its proper divisors (1973079420).

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

1013201220 is a wasteful number, since it uses less digits than its factorization.

1013201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888804 (or 888802 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1013201220 is about 31830.8218555538. The cubic root of 1013201220 is about 1004.3811838627.

Adding to 1013201220 its reverse (221023101), we get a palindrome (1234224321).

The spelling of 1013201220 in words is "one billion, thirteen million, two hundred one thousand, two hundred twenty".