202031013021 has 4 divisors (see below), whose sum is σ = 269374684032. Its totient is φ = 134687342012.

The previous prime is 202031012969. The next prime is 202031013031. The reversal of 202031013021 is 120310130202.

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 202031013021 - 2²² = 202026818717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202031013031) 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, 33671835501 + ... + 33671835506.

It is an arithmetic number, because the mean of its divisors is an integer number (67343671008).

Almost surely, 2^202031013021 is an apocalyptic number.

It is an amenable number.

202031013021 is a deficient number, since it is larger than the sum of its proper divisors (67343671011).

202031013021 is an equidigital number, since it uses as much as digits as its factorization.

202031013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67343671010.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 202031013021 its reverse (120310130202), we get a palindrome (322341143223).

The spelling of 202031013021 in words is "two hundred two billion, thirty-one million, thirteen thousand, twenty-one".