21151040132 has 12 divisors (see below), whose sum is σ = 37167908316. Its totient is φ = 10531637760.

The previous prime is 21151040129. The next prime is 21151040153. The reversal of 21151040132 is 23104015112.

It can be written as a sum of positive squares in 2 ways, for example, as 16834024516 + 4317015616 = 129746^2 + 65704^2 .

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, 10969493 + ... + 10971420.

It is an arithmetic number, because the mean of its divisors is an integer number (3097325693).

Almost surely, 2^21151040132 is an apocalyptic number.

It is an amenable number.

21151040132 is a deficient number, since it is larger than the sum of its proper divisors (16016868184).

21151040132 is a wasteful number, since it uses less digits than its factorization.

21151040132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21941158 (or 21941156 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 21151040132 its reverse (23104015112), we get a palindrome (44255055244).

The spelling of 21151040132 in words is "twenty-one billion, one hundred fifty-one million, forty thousand, one hundred thirty-two".