21002133222 has 64 divisors (see below), whose sum is σ = 53647234560. Its totient is φ = 5965905312.

The previous prime is 21002133133. The next prime is 21002133247. The reversal of 21002133222 is 22233120012.

It is a super-2 number, since 2×21002133222² (a number of 21 digits) contains 22 as substring.

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 = 21002133195 and 21002133204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95188 + ... + 225975.

It is an arithmetic number, because the mean of its divisors is an integer number (838238040).

Almost surely, 2^21002133222 is an apocalyptic number.

21002133222 is an abundant number, since it is smaller than the sum of its proper divisors (32645101338).

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

21002133222 is a wasteful number, since it uses less digits than its factorization.

21002133222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321354 (or 321348 counting only the distinct ones).

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

Adding to 21002133222 its reverse (22233120012), we get a palindrome (43235253234).

The spelling of 21002133222 in words is "twenty-one billion, two million, one hundred thirty-three thousand, two hundred twenty-two".