21163135155111 has 12 divisors (see below), whose sum is σ = 30569488914120. Its totient is φ = 14108518656720.

The previous prime is 21163135155101. The next prime is 21163135155133. The reversal of 21163135155111 is 11155153136112.

21163135155111 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 3 + 135 + 1 + 5 + 511 + 1 = 666.

It is not a de Polignac number, because 21163135155111 - 2²¹ = 21163133057959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21163135155101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19279041 + ... + 20347178.

It is an arithmetic number, because the mean of its divisors is an integer number (2547457409510).

Almost surely, 2^{21163135155111} is an apocalyptic number.

21163135155111 is a deficient number, since it is larger than the sum of its proper divisors (9406353759009).

21163135155111 is a wasteful number, since it uses less digits than its factorization.

21163135155111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39685566 (or 39685563 counting only the distinct ones).

The product of its digits is 13500, while the sum is 36.

The spelling of 21163135155111 in words is "twenty-one trillion, one hundred sixty-three billion, one hundred thirty-five million, one hundred fifty-five thousand, one hundred eleven".