20202112021 has 32 divisors (see below), whose sum is σ = 25005754368. Its totient is φ = 15893357760.

The previous prime is 20202112009. The next prime is 20202112039. The reversal of 20202112021 is 12021120202.

It is a happy number.

It is not a de Polignac number, because 20202112021 - 2⁵ = 20202111989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20202111992 and 20202112010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202112321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15503656 + ... + 15504958.

It is an arithmetic number, because the mean of its divisors is an integer number (781429824).

Almost surely, 2^20202112021 is an apocalyptic number.

It is an amenable number.

20202112021 is a deficient number, since it is larger than the sum of its proper divisors (4803642347).

20202112021 is a wasteful number, since it uses less digits than its factorization.

20202112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161.

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

Adding to 20202112021 its reverse (12021120202), we get a palindrome (32223232223).

The spelling of 20202112021 in words is "twenty billion, two hundred two million, one hundred twelve thousand, twenty-one".