126056121399 has 32 divisors (see below), whose sum is σ = 201141436160. Its totient is φ = 77562870624.

The previous prime is 126056121397. The next prime is 126056121421. The reversal of 126056121399 is 993121650621.

126056121399 is a `hidden beast` number, since 1 + 2 + 60 + 561 + 21 + 3 + 9 + 9 = 666.

It is not a de Polignac number, because 126056121399 - 2¹ = 126056121397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126056121397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3366072 + ... + 3403314.

It is an arithmetic number, because the mean of its divisors is an integer number (6285669880).

Almost surely, 2^126056121399 is an apocalyptic number.

126056121399 is a deficient number, since it is larger than the sum of its proper divisors (75085314761).

126056121399 is a wasteful number, since it uses less digits than its factorization.

126056121399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46908 (or 46902 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 126056121399 in words is "one hundred twenty-six billion, fifty-six million, one hundred twenty-one thousand, three hundred ninety-nine".