21203213332 has 24 divisors (see below), whose sum is σ = 42413051520. Its totient is φ = 9085671840.

The previous prime is 21203213261. The next prime is 21203213333. The reversal of 21203213332 is 23331230212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203213333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134394 + ... + 245902.

It is an arithmetic number, because the mean of its divisors is an integer number (1767210480).

Almost surely, 2^21203213332 is an apocalyptic number.

It is an amenable number.

21203213332 is an abundant number, since it is smaller than the sum of its proper divisors (21209838188).

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

21203213332 is a wasteful number, since it uses less digits than its factorization.

21203213332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118311 (or 118309 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21203213332 its reverse (23331230212), we get a palindrome (44534443544).

The spelling of 21203213332 in words is "twenty-one billion, two hundred three million, two hundred thirteen thousand, three hundred thirty-two".