1202021220 has 96 divisors (see below), whose sum is σ = 3469729536. Its totient is φ = 310694400.

The previous prime is 1202021209. The next prime is 1202021237. The reversal of 1202021220 is 221202021.

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 = 1202021196 and 1202021205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 689550 + ... + 691290.

It is an arithmetic number, because the mean of its divisors is an integer number (36143016).

Almost surely, 2^1202021220 is an apocalyptic number.

1202021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1202021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1734864768).

1202021220 is an abundant number, since it is smaller than the sum of its proper divisors (2267708316).

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

1202021220 is a wasteful number, since it uses less digits than its factorization.

1202021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101 (or 2099 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1202021220 is about 34670.1776747683. The cubic root of 1202021220 is about 1063.2548641717.

Adding to 1202021220 its reverse (221202021), we get a palindrome (1423223241).

The spelling of 1202021220 in words is "one billion, two hundred two million, twenty-one thousand, two hundred twenty".