900021010120001 has 96 divisors (see below), whose sum is σ = 1194728260239360. Its totient is φ = 662358113303040.

The previous prime is 900021010119943. The next prime is 900021010120061. The reversal of 900021010120001 is 100021010120009.

It is not a de Polignac number, because 900021010120001 - 2²⁶ = 900020943011137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (900021010120061) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 578178560 + ... + 579733118.

It is an arithmetic number, because the mean of its divisors is an integer number (12445086044160).

Almost surely, 2^{900021010120001} is an apocalyptic number.

It is an amenable number.

900021010120001 is a deficient number, since it is larger than the sum of its proper divisors (294707250119359).

900021010120001 is a wasteful number, since it uses less digits than its factorization.

900021010120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554987 (or 1554976 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 900021010120001 in words is "nine hundred trillion, twenty-one billion, ten million, one hundred twenty thousand, one".