20121010021120 has 72 divisors (see below), whose sum is σ = 48219184601280. Its totient is φ = 8044550184960.

The previous prime is 20121010021109. The next prime is 20121010021193. The reversal of 20121010021120 is 2112001012102.

It is a super-2 number, since 2×20121010021120² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20121010021120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088536 + ... + 6436375.

It is an arithmetic number, because the mean of its divisors is an integer number (669710897240).

Almost surely, 2^{20121010021120} is an apocalyptic number.

20121010021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121010021120 is an abundant number, since it is smaller than the sum of its proper divisors (28098174580160).

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

20121010021120 is an equidigital number, since it uses as much as digits as its factorization.

20121010021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7527021 (or 7527007 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121010021120 its reverse (2112001012102), we get a palindrome (22233011033222).

The spelling of 20121010021120 in words is "twenty trillion, one hundred twenty-one billion, ten million, twenty-one thousand, one hundred twenty".