101561857213 has 8 divisors (see below), whose sum is σ = 103750463232. Its totient is φ = 99374406096.

The previous prime is 101561857193. The next prime is 101561857237. The reversal of 101561857213 is 312758165101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101561857213 - 2²⁵ = 101528302781 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 (101561857253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109770 + ... + 463867.

It is an arithmetic number, because the mean of its divisors is an integer number (12968807904).

Almost surely, 2^101561857213 is an apocalyptic number.

It is an amenable number.

101561857213 is a deficient number, since it is larger than the sum of its proper divisors (2188606019).

101561857213 is an equidigital number, since it uses as much as digits as its factorization.

101561857213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577451.

The product of its (nonzero) digits is 50400, while the sum is 40.

The spelling of 101561857213 in words is "one hundred one billion, five hundred sixty-one million, eight hundred fifty-seven thousand, two hundred thirteen".