870900110921 has 4 divisors (see below), whose sum is σ = 872334872832. Its totient is φ = 869465349012.

The previous prime is 870900110909. The next prime is 870900110929. The reversal of 870900110921 is 129011009078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 870900110921 - 2²⁶ = 870833002057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870900110929) 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, 717380045 + ... + 717381258.

It is an arithmetic number, because the mean of its divisors is an integer number (218083718208).

Almost surely, 2^870900110921 is an apocalyptic number.

It is an amenable number.

870900110921 is a deficient number, since it is larger than the sum of its proper divisors (1434761911).

870900110921 is a wasteful number, since it uses less digits than its factorization.

870900110921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434761910.

The product of its (nonzero) digits is 9072, while the sum is 38.

Adding to 870900110921 its reverse (129011009078), we get a palindrome (999911119999).

The spelling of 870900110921 in words is "eight hundred seventy billion, nine hundred million, one hundred ten thousand, nine hundred twenty-one".