126600036121 has 4 divisors (see below), whose sum is σ = 136338500452. Its totient is φ = 116861571792.

The previous prime is 126600036109. The next prime is 126600036151. The reversal of 126600036121 is 121630006621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121630006621 = 5641 ⋅21561781.

It can be written as a sum of positive squares in 2 ways, for example, as 10226265625 + 116373770496 = 101125^2 + 341136^2 .

It is a cyclic number.

It is not a de Polignac number, because 126600036121 - 2¹¹ = 126600034073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126600036121.

It is not an unprimeable number, because it can be changed into a prime (126600036151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4869232146 + ... + 4869232171.

It is an arithmetic number, because the mean of its divisors is an integer number (34084625113).

Almost surely, 2^126600036121 is an apocalyptic number.

It is an amenable number.

126600036121 is a deficient number, since it is larger than the sum of its proper divisors (9738464331).

126600036121 is an equidigital number, since it uses as much as digits as its factorization.

126600036121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9738464330.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 126600036121 in words is "one hundred twenty-six billion, six hundred million, thirty-six thousand, one hundred twenty-one".