21121120122 has 16 divisors (see below), whose sum is σ = 42637028832. Its totient is φ = 6974575280.

The previous prime is 21121120117. The next prime is 21121120169. The reversal of 21121120122 is 22102112112.

It is a super-2 number, since 2×21121120122² (a number of 21 digits) contains 22 as substring.

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, 16448829 + ... + 16450112.

It is an arithmetic number, because the mean of its divisors is an integer number (2664814302).

Almost surely, 2^21121120122 is an apocalyptic number.

21121120122 is an abundant number, since it is smaller than the sum of its proper divisors (21515908710).

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

21121120122 is a wasteful number, since it uses less digits than its factorization.

21121120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32899053.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21121120122 its reverse (22102112112), we get a palindrome (43223232234).

The spelling of 21121120122 in words is "twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, one hundred twenty-two".