21120122021011 has 24 divisors (see below), whose sum is σ = 24359995979424. Its totient is φ = 18238830405120.

The previous prime is 21120122020999. The next prime is 21120122021017. The reversal of 21120122021011 is 11012022102112.

It is not a de Polignac number, because 21120122021011 - 2³³ = 21111532086419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120122021017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21529920 + ... + 22489501.

It is an arithmetic number, because the mean of its divisors is an integer number (1014999832476).

Almost surely, 2^{21120122021011} is an apocalyptic number.

21120122021011 is a deficient number, since it is larger than the sum of its proper divisors (3239873958413).

21120122021011 is a wasteful number, since it uses less digits than its factorization.

21120122021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44019631 (or 44019618 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21120122021011 its reverse (11012022102112), we get a palindrome (32132144123123).

The spelling of 21120122021011 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty-two million, twenty-one thousand, eleven".