202021200012021 has 16 divisors (see below), whose sum is σ = 293753643644160. Its totient is φ = 122747058233280.

The previous prime is 202021200012011. The next prime is 202021200012029. The reversal of 202021200012021 is 120210002120202.

It is not a de Polignac number, because 202021200012021 - 2²³ = 202021191623413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021200012029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32785001790 + ... + 32785007951.

It is an arithmetic number, because the mean of its divisors is an integer number (18359602727760).

Almost surely, 2^{202021200012021} is an apocalyptic number.

It is an amenable number.

202021200012021 is a deficient number, since it is larger than the sum of its proper divisors (91732443632139).

202021200012021 is a wasteful number, since it uses less digits than its factorization.

202021200012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65570009836.

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

Adding to 202021200012021 its reverse (120210002120202), we get a palindrome (322231202132223).

The spelling of 202021200012021 in words is "two hundred two trillion, twenty-one billion, two hundred million, twelve thousand, twenty-one".