202112002021 has 4 divisors (see below), whose sum is σ = 202130988544. Its totient is φ = 202093015500.

The previous prime is 202112002007. The next prime is 202112002033. The reversal of 202112002021 is 120200211202.

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 202112002021 - 2⁷ = 202112001893 is a prime.

It is a super-2 number, since 2×202112002021² (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 = 202112001992 and 202112002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202112002051) 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, 9477285 + ... + 9498586.

It is an arithmetic number, because the mean of its divisors is an integer number (50532747136).

Almost surely, 2^202112002021 is an apocalyptic number.

It is an amenable number.

202112002021 is a deficient number, since it is larger than the sum of its proper divisors (18986523).

202112002021 is a wasteful number, since it uses less digits than its factorization.

202112002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18986522.

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

Adding to 202112002021 its reverse (120200211202), we get a palindrome (322312213223).

The spelling of 202112002021 in words is "two hundred two billion, one hundred twelve million, two thousand, twenty-one".