20212040122021 has 24 divisors (see below), whose sum is σ = 22489766893440. Its totient is φ = 18148714235520.

The previous prime is 20212040121989. The next prime is 20212040122033. The reversal of 20212040122021 is 12022104021202.

It is not a de Polignac number, because 20212040122021 - 2⁵ = 20212040121989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20212040122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212040122121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40718701 + ... + 41212093.

It is an arithmetic number, because the mean of its divisors is an integer number (937073620560).

Almost surely, 2^{20212040122021} is an apocalyptic number.

It is an amenable number.

20212040122021 is a deficient number, since it is larger than the sum of its proper divisors (2277726771419).

20212040122021 is a wasteful number, since it uses less digits than its factorization.

20212040122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497577 (or 497566 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20212040122021 its reverse (12022104021202), we get a palindrome (32234144143223).

The spelling of 20212040122021 in words is "twenty trillion, two hundred twelve billion, forty million, one hundred twenty-two thousand, twenty-one".