21332131012 has 24 divisors (see below), whose sum is σ = 39533712120. Its totient is φ = 10036992000.

The previous prime is 21332130959. The next prime is 21332131031. The reversal of 21332131012 is 21013123312.

It can be written as a sum of positive squares in 4 ways, for example, as 6937890436 + 14394240576 = 83294^2 + 119976^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453664 + ... + 498472.

It is an arithmetic number, because the mean of its divisors is an integer number (1647238005).

Almost surely, 2^21332131012 is an apocalyptic number.

It is an amenable number.

21332131012 is a deficient number, since it is larger than the sum of its proper divisors (18201581108).

21332131012 is a wasteful number, since it uses less digits than its factorization.

21332131012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51831 (or 51829 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21332131012 its reverse (21013123312), we get a palindrome (42345254324).

It can be divided in two parts, 2133 and 2131012, that added together give a triangular number (2133145 = T₂₀₆₅).

The spelling of 21332131012 in words is "twenty-one billion, three hundred thirty-two million, one hundred thirty-one thousand, twelve".