126321120009 has 72 divisors (see below), whose sum is σ = 219244945920. Its totient is φ = 69809040000.

The previous prime is 126321119993. The next prime is 126321120011. The reversal of 126321120009 is 900021123621.

126321120009 is a `hidden beast` number, since 1 + 2 + 632 + 1 + 1 + 20 + 0 + 0 + 9 = 666.

It is not a de Polignac number, because 126321120009 - 2⁴ = 126321119993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126321120109) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 41025132 + ... + 41028210.

Almost surely, 2^126321120009 is an apocalyptic number.

It is an amenable number.

126321120009 is a deficient number, since it is larger than the sum of its proper divisors (92923825911).

126321120009 is a wasteful number, since it uses less digits than its factorization.

126321120009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6131 (or 6121 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The spelling of 126321120009 in words is "one hundred twenty-six billion, three hundred twenty-one million, one hundred twenty thousand, nine".