10012021220 has 12 divisors (see below), whose sum is σ = 21025244604. Its totient is φ = 4004808480.

The previous prime is 10012021153. The next prime is 10012021231. The reversal of 10012021220 is 2212021001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4372912384 + 5639108836 = 66128^2 + 75094^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250300511 + ... + 250300550.

It is an arithmetic number, because the mean of its divisors is an integer number (1752103717).

Almost surely, 2^10012021220 is an apocalyptic number.

10012021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10012021220 is an abundant number, since it is smaller than the sum of its proper divisors (11013223384).

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

10012021220 is a wasteful number, since it uses less digits than its factorization.

10012021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500601070 (or 500601068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10012021220 its reverse (2212021001), we get a palindrome (12224042221).

The spelling of 10012021220 in words is "ten billion, twelve million, twenty-one thousand, two hundred twenty".