21271249324 has 24 divisors (see below), whose sum is σ = 41470475760. Its totient is φ = 9478964544.

The previous prime is 21271249301. The next prime is 21271249333. The reversal of 21271249324 is 42394217212.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7051294 + ... + 7054309.

It is an arithmetic number, because the mean of its divisors is an integer number (1727936490).

Almost surely, 2^21271249324 is an apocalyptic number.

It is an amenable number.

21271249324 is a deficient number, since it is larger than the sum of its proper divisors (20199226436).

21271249324 is a wasteful number, since it uses less digits than its factorization.

21271249324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14105649 (or 14105647 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The spelling of 21271249324 in words is "twenty-one billion, two hundred seventy-one million, two hundred forty-nine thousand, three hundred twenty-four".