21033131332 has 12 divisors (see below), whose sum is σ = 36813134736. Its totient is φ = 10515092840.

The previous prime is 21033131321. The next prime is 21033131359. The reversal of 21033131332 is 23313133012.

It is a super-2 number, since 2×21033131332² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335758 + ... + 393445.

It is an arithmetic number, because the mean of its divisors is an integer number (3067761228).

Almost surely, 2^21033131332 is an apocalyptic number.

It is an amenable number.

21033131332 is a deficient number, since it is larger than the sum of its proper divisors (15780003404).

21033131332 is a wasteful number, since it uses less digits than its factorization.

21033131332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736418 (or 736416 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21033131332 its reverse (23313133012), we get a palindrome (44346264344).

The spelling of 21033131332 in words is "twenty-one billion, thirty-three million, one hundred thirty-one thousand, three hundred thirty-two".