21112020121152 has 28 divisors (see below), whose sum is σ = 55858886571056. Its totient is φ = 7037340040320.

The previous prime is 21112020121151. The next prime is 21112020121169. The reversal of 21112020121152 is 25112102021112.

It is not an unprimeable number, because it can be changed into a prime (21112020121151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54979218874 + ... + 54979219257.

Almost surely, 2^{21112020121152} is an apocalyptic number.

It is an amenable number.

21112020121152 is an abundant number, since it is smaller than the sum of its proper divisors (34746866449904).

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

21112020121152 is a wasteful number, since it uses less digits than its factorization.

21112020121152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109958438146 (or 109958438136 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 21.

Adding to 21112020121152 its reverse (25112102021112), we get a palindrome (46224122142264).

The spelling of 21112020121152 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one hundred twenty-one thousand, one hundred fifty-two".