21162651132155 has 16 divisors (see below), whose sum is σ = 27349092876000. Its totient is φ = 15627554754048.

The previous prime is 21162651132061. The next prime is 21162651132197. The reversal of 21162651132155 is 55123115626112.

It is a cyclic number.

It is not a de Polignac number, because 21162651132155 - 2⁸ = 21162651131899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1563779 + ... + 6691091.

It is an arithmetic number, because the mean of its divisors is an integer number (1709318304750).

Almost surely, 2^{21162651132155} is an apocalyptic number.

21162651132155 is a deficient number, since it is larger than the sum of its proper divisors (6186441743845).

21162651132155 is a wasteful number, since it uses less digits than its factorization.

21162651132155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5190830.

The product of its digits is 108000, while the sum is 41.

Adding to 21162651132155 its reverse (55123115626112), we get a palindrome (76285766758267).

The spelling of 21162651132155 in words is "twenty-one trillion, one hundred sixty-two billion, six hundred fifty-one million, one hundred thirty-two thousand, one hundred fifty-five".