21310213332 has 24 divisors (see below), whose sum is σ = 49762804896. Its totient is φ = 7097836768.

The previous prime is 21310213321. The next prime is 21310213333. The reversal of 21310213332 is 23331201312.

It is a junction number, because it is equal to n+sod(n) for n = 21310213299 and 21310213308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310213333) 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, 679998 + ... + 710645.

It is an arithmetic number, because the mean of its divisors is an integer number (2073450204).

Almost surely, 2^21310213332 is an apocalyptic number.

It is an amenable number.

21310213332 is an abundant number, since it is smaller than the sum of its proper divisors (28452591564).

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

21310213332 is a wasteful number, since it uses less digits than its factorization.

21310213332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391927 (or 1391925 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21310213332 its reverse (23331201312), we get a palindrome (44641414644).

The spelling of 21310213332 in words is "twenty-one billion, three hundred ten million, two hundred thirteen thousand, three hundred thirty-two".