21126135386151 has 12 divisors (see below), whose sum is σ = 32121609359320. Its totient is φ = 13342822349040.

The previous prime is 21126135386149. The next prime is 21126135386177. The reversal of 21126135386151 is 15168353162112.

21126135386151 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 6 + 1 + 3 + 538 + 61 + 51 = 666.

It is not a de Polignac number, because 21126135386151 - 2¹ = 21126135386149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21126135386097 and 21126135386106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21126135386651) 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, 61772325520 + ... + 61772325861.

Almost surely, 2^{21126135386151} is an apocalyptic number.

21126135386151 is a deficient number, since it is larger than the sum of its proper divisors (10995473973169).

21126135386151 is a wasteful number, since it uses less digits than its factorization.

21126135386151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123544651406 (or 123544651403 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The spelling of 21126135386151 in words is "twenty-one trillion, one hundred twenty-six billion, one hundred thirty-five million, three hundred eighty-six thousand, one hundred fifty-one".