100561042311 has 4 divisors (see below), whose sum is σ = 134081389752. Its totient is φ = 67040694872.

The previous prime is 100561042279. The next prime is 100561042319. The reversal of 100561042311 is 113240165001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100561042311 - 2⁵ = 100561042279 is a prime.

It is a super-2 number, since 2×100561042311² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100561042319) 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, 16760173716 + ... + 16760173721.

It is an arithmetic number, because the mean of its divisors is an integer number (33520347438).

Almost surely, 2^100561042311 is an apocalyptic number.

100561042311 is a deficient number, since it is larger than the sum of its proper divisors (33520347441).

100561042311 is an equidigital number, since it uses as much as digits as its factorization.

100561042311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33520347440.

The product of its (nonzero) digits is 720, while the sum is 24.

The spelling of 100561042311 in words is "one hundred billion, five hundred sixty-one million, forty-two thousand, three hundred eleven".