21160132422656 has 22 divisors (see below), whose sum is σ = 42299600655540. Its totient is φ = 10580066210816.

The previous prime is 21160132422631. The next prime is 21160132422659. The reversal of 21160132422656 is 65622423106112.

It is not an unprimeable number, because it can be changed into a prime (21160132422659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10332094886 + ... + 10332096933.

Almost surely, 2^{21160132422656} is an apocalyptic number.

It is an amenable number.

21160132422656 is a deficient number, since it is larger than the sum of its proper divisors (21139468232884).

21160132422656 is an equidigital number, since it uses as much as digits as its factorization.

21160132422656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20664191839 (or 20664191821 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

Adding to 21160132422656 its reverse (65622423106112), we get a palindrome (86782555528768).

The spelling of 21160132422656 in words is "twenty-one trillion, one hundred sixty billion, one hundred thirty-two million, four hundred twenty-two thousand, six hundred fifty-six".