21023032122 has 48 divisors (see below), whose sum is σ = 45983388672. Its totient is φ = 6941168640.

The previous prime is 21023032117. The next prime is 21023032157. The reversal of 21023032122 is 22123032012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21023032095 and 21023032104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1458153 + ... + 1472499.

It is an arithmetic number, because the mean of its divisors is an integer number (957987264).

Almost surely, 2^21023032122 is an apocalyptic number.

21023032122 is an abundant number, since it is smaller than the sum of its proper divisors (24960356550).

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

21023032122 is a wasteful number, since it uses less digits than its factorization.

21023032122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15123 (or 15120 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21023032122 its reverse (22123032012), we get a palindrome (43146064134).

The spelling of 21023032122 in words is "twenty-one billion, twenty-three million, thirty-two thousand, one hundred twenty-two".