21031311332 has 24 divisors (see below), whose sum is σ = 37179098880. Its totient is φ = 10409235840.

The previous prime is 21031311331. The next prime is 21031311359. The reversal of 21031311332 is 23311313012.

It is a super-2 number, since 2×21031311332² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21031311331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95669 + ... + 226307.

It is an arithmetic number, because the mean of its divisors is an integer number (1549129120).

Almost surely, 2^21031311332 is an apocalyptic number.

It is an amenable number.

21031311332 is a deficient number, since it is larger than the sum of its proper divisors (16147787548).

21031311332 is a wasteful number, since it uses less digits than its factorization.

21031311332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131051 (or 131049 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21031311332 its reverse (23311313012), we get a palindrome (44342624344).

The spelling of 21031311332 in words is "twenty-one billion, thirty-one million, three hundred eleven thousand, three hundred thirty-two".