872100320001 has 4 divisors (see below), whose sum is σ = 1162800426672. Its totient is φ = 581400213332.

The previous prime is 872100319967. The next prime is 872100320051. The reversal of 872100320001 is 100023001278.

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 872100320001 - 2¹⁰ = 872100318977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (872100320051) 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, 145350053331 + ... + 145350053336.

It is an arithmetic number, because the mean of its divisors is an integer number (290700106668).

Almost surely, 2^872100320001 is an apocalyptic number.

It is an amenable number.

872100320001 is a deficient number, since it is larger than the sum of its proper divisors (290700106671).

872100320001 is a wasteful number, since it uses less digits than its factorization.

872100320001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290700106670.

The product of its (nonzero) digits is 672, while the sum is 24.

Adding to 872100320001 its reverse (100023001278), we get a palindrome (972123321279).

The spelling of 872100320001 in words is "eight hundred seventy-two billion, one hundred million, three hundred twenty thousand, one".