21155164243132 has 6 divisors (see below), whose sum is σ = 37021537425488. Its totient is φ = 10577582121564.

The previous prime is 21155164243127. The next prime is 21155164243141. The reversal of 21155164243132 is 23134246155112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2644395530388 + ... + 2644395530395.

Almost surely, 2^{21155164243132} is an apocalyptic number.

It is an amenable number.

21155164243132 is a deficient number, since it is larger than the sum of its proper divisors (15866373182356).

21155164243132 is a wasteful number, since it uses less digits than its factorization.

21155164243132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5288791060787 (or 5288791060785 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The spelling of 21155164243132 in words is "twenty-one trillion, one hundred fifty-five billion, one hundred sixty-four million, two hundred forty-three thousand, one hundred thirty-two".