202210202120021 has 4 divisors (see below), whose sum is σ = 202210994204544. Its totient is φ = 202209410035500.

The previous prime is 202210202120011. The next prime is 202210202120081. The reversal of 202210202120021 is 120021202012202.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-202210202120021 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 (202210202120011) 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, 395659205 + ... + 396169946.

It is an arithmetic number, because the mean of its divisors is an integer number (50552748551136).

Almost surely, 2^{202210202120021} is an apocalyptic number.

It is an amenable number.

202210202120021 is a deficient number, since it is larger than the sum of its proper divisors (792084523).

202210202120021 is an equidigital number, since it uses as much as digits as its factorization.

202210202120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792084522.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202210202120021 its reverse (120021202012202), we get a palindrome (322231404132223).

The spelling of 202210202120021 in words is "two hundred two trillion, two hundred ten billion, two hundred two million, one hundred twenty thousand, twenty-one".