20200022212021 has 4 divisors (see below), whose sum is σ = 20400022432044. Its totient is φ = 20000021992000.

The previous prime is 20200022211961. The next prime is 20200022212031. The reversal of 20200022212021 is 12021222000202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19741679671921 + 458342540100 = 4443161^2 + 677010^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200022212021 - 2²⁹ = 20199485341109 is a prime.

It is a super-2 number, since 2×20200022212021² (a number of 27 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 = 20200022211986 and 20200022212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200022212031) 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, 100000109860 + ... + 100000110061.

It is an arithmetic number, because the mean of its divisors is an integer number (5100005608011).

Almost surely, 2^{20200022212021} is an apocalyptic number.

It is an amenable number.

20200022212021 is a deficient number, since it is larger than the sum of its proper divisors (200000220023).

20200022212021 is a wasteful number, since it uses less digits than its factorization.

20200022212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200000220022.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20200022212021 its reverse (12021222000202), we get a palindrome (32221244212223).

The spelling of 20200022212021 in words is "twenty trillion, two hundred billion, twenty-two million, two hundred twelve thousand, twenty-one".