101139855075428 has 12 divisors (see below), whose sum is σ = 190609726873020. Its totient is φ = 46679933111712.

The previous prime is 101139855075379. The next prime is 101139855075481. The reversal of 101139855075428 is 824570558931101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24113815578724 + 77026039496704 = 4910582^2 + 8776448^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972498606443 + ... + 972498606546.

It is an arithmetic number, because the mean of its divisors is an integer number (15884143906085).

Almost surely, 2^{101139855075428} is an apocalyptic number.

It is an amenable number.

101139855075428 is a deficient number, since it is larger than the sum of its proper divisors (89469871797592).

101139855075428 is a wasteful number, since it uses less digits than its factorization.

101139855075428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944997213006 (or 1944997213004 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 59.

The spelling of 101139855075428 in words is "one hundred one trillion, one hundred thirty-nine billion, eight hundred fifty-five million, seventy-five thousand, four hundred twenty-eight".