21022123332 has 24 divisors (see below), whose sum is σ = 56058995776. Its totient is φ = 6006320928.

The previous prime is 21022123319. The next prime is 21022123351. The reversal of 21022123332 is 23332122012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21022123299 and 21022123308.

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, 125131603 + ... + 125131770.

Almost surely, 2^21022123332 is an apocalyptic number.

It is an amenable number.

21022123332 is an abundant number, since it is smaller than the sum of its proper divisors (35036872444).

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

21022123332 is a wasteful number, since it uses less digits than its factorization.

21022123332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250263387 (or 250263385 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21022123332 its reverse (23332122012), we get a palindrome (44354245344).

The spelling of 21022123332 in words is "twenty-one billion, twenty-two million, one hundred twenty-three thousand, three hundred thirty-two".