126127149921 has 64 divisors (see below), whose sum is σ = 209277872640. Its totient is φ = 74660382720.

The previous prime is 126127149899. The next prime is 126127149949. The reversal of 126127149921 is 129941721621.

126127149921 is a `hidden beast` number, since 1 + 2 + 612 + 7 + 1 + 4 + 9 + 9 + 21 = 666.

It is not a de Polignac number, because 126127149921 - 2⁶ = 126127149857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126127149521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 688831 + ... + 852491.

It is an arithmetic number, because the mean of its divisors is an integer number (3269966760).

Almost surely, 2^126127149921 is an apocalyptic number.

It is an amenable number.

126127149921 is a deficient number, since it is larger than the sum of its proper divisors (83150722719).

126127149921 is a wasteful number, since it uses less digits than its factorization.

126127149921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163783 (or 163777 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The spelling of 126127149921 in words is "one hundred twenty-six billion, one hundred twenty-seven million, one hundred forty-nine thousand, nine hundred twenty-one".