202102212021 has 8 divisors (see below), whose sum is σ = 285320769984. Its totient is φ = 126809231040.

The previous prime is 202102212017. The next prime is 202102212029. The reversal of 202102212021 is 120212201202.

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

It is not a de Polignac number, because 202102212021 - 2² = 202102212017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102212029) 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, 1981394185 + ... + 1981394286.

It is an arithmetic number, because the mean of its divisors is an integer number (35665096248).

Almost surely, 2^202102212021 is an apocalyptic number.

It is an amenable number.

202102212021 is a deficient number, since it is larger than the sum of its proper divisors (83218557963).

202102212021 is a wasteful number, since it uses less digits than its factorization.

202102212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962788491.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202102212021 its reverse (120212201202), we get a palindrome (322314413223).

The spelling of 202102212021 in words is "two hundred two billion, one hundred two million, two hundred twelve thousand, twenty-one".