902121200021001 has 4 divisors (see below), whose sum is σ = 1202828266694672. Its totient is φ = 601414133347332.

The previous prime is 902121200020979. The next prime is 902121200021047. The reversal of 902121200021001 is 100120002121209.

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 not a de Polignac number, because 902121200021001 - 2³⁵ = 902086840282633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (902121200029001) 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, 150353533336831 + ... + 150353533336836.

It is an arithmetic number, because the mean of its divisors is an integer number (300707066673668).

Almost surely, 2^{902121200021001} is an apocalyptic number.

It is an amenable number.

902121200021001 is a deficient number, since it is larger than the sum of its proper divisors (300707066673671).

902121200021001 is a wasteful number, since it uses less digits than its factorization.

902121200021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300707066673670.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 902121200021001 in words is "nine hundred two trillion, one hundred twenty-one billion, two hundred million, twenty-one thousand, one".