202102303313021 has 4 divisors (see below), whose sum is σ = 202104037662492. Its totient is φ = 202100568963552.

The previous prime is 202102303312981. The next prime is 202102303313051. The reversal of 202102303313021 is 120313303201202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96090280579225 + 106012022733796 = 9802565^2 + 10296214^2 .

It is a cyclic number.

It is not a de Polignac number, because 202102303313021 - 2²² = 202102299118717 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 (202102303313051) 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, 866999930 + ... + 867233003.

It is an arithmetic number, because the mean of its divisors is an integer number (50526009415623).

Almost surely, 2^{202102303313021} is an apocalyptic number.

It is an amenable number.

202102303313021 is a deficient number, since it is larger than the sum of its proper divisors (1734349471).

202102303313021 is a wasteful number, since it uses less digits than its factorization.

202102303313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734349470.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 202102303313021 its reverse (120313303201202), we get a palindrome (322415606514223).

The spelling of 202102303313021 in words is "two hundred two trillion, one hundred two billion, three hundred three million, three hundred thirteen thousand, twenty-one".