10010021220 has 72 divisors (see below), whose sum is σ = 30372014400. Its totient is φ = 2668610880.

The previous prime is 10010021201. The next prime is 10010021257. The reversal of 10010021220 is 2212001001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1111335 + ... + 1120305.

Almost surely, 2^10010021220 is an apocalyptic number.

10010021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10010021220 is an abundant number, since it is smaller than the sum of its proper divisors (20361993180).

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

10010021220 is a wasteful number, since it uses less digits than its factorization.

10010021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15185 (or 15180 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10010021220 its reverse (2212001001), we get a palindrome (12222022221).

The spelling of 10010021220 in words is "ten billion, ten million, twenty-one thousand, two hundred twenty".