202312121021 has 8 divisors (see below), whose sum is σ = 208388034624. Its totient is φ = 196298524800.

The previous prime is 202312121009. The next prime is 202312121083. The reversal of 202312121021 is 120121213202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202312121021 - 2³⁰ = 201238379197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202312123021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15572756 + ... + 15585741.

It is an arithmetic number, because the mean of its divisors is an integer number (26048504328).

Almost surely, 2^202312121021 is an apocalyptic number.

It is an amenable number.

202312121021 is a deficient number, since it is larger than the sum of its proper divisors (6075913603).

202312121021 is a wasteful number, since it uses less digits than its factorization.

202312121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31158691.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 202312121021 its reverse (120121213202), we get a palindrome (322433334223).

The spelling of 202312121021 in words is "two hundred two billion, three hundred twelve million, one hundred twenty-one thousand, twenty-one".