202001122021 has 4 divisors (see below), whose sum is σ = 202033968544. Its totient is φ = 201968275500.

The previous prime is 202001122013. The next prime is 202001122033. The reversal of 202001122021 is 120221100202.

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 not a de Polignac number, because 202001122021 - 2³ = 202001122013 is a prime.

It is a super-2 number, since 2×202001122021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202001121992 and 202001122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202001122051) 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, 16414035 + ... + 16426336.

It is an arithmetic number, because the mean of its divisors is an integer number (50508492136).

Almost surely, 2^202001122021 is an apocalyptic number.

It is an amenable number.

202001122021 is a deficient number, since it is larger than the sum of its proper divisors (32846523).

202001122021 is an equidigital number, since it uses as much as digits as its factorization.

202001122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32846522.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202001122021 its reverse (120221100202), we get a palindrome (322222222223).

The spelling of 202001122021 in words is "two hundred two billion, one million, one hundred twenty-two thousand, twenty-one".