20212221200022 has 40 divisors (see below), whose sum is σ = 45345378601776. Its totient is φ = 6729220622448.

The previous prime is 20212221199987. The next prime is 20212221200051. The reversal of 20212221200022 is 22000212221202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20212221199968 and 20212221200004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 75666673 + ... + 75933324.

Almost surely, 2^{20212221200022} is an apocalyptic number.

20212221200022 is an abundant number, since it is smaller than the sum of its proper divisors (25133157401754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20212221200022 is a wasteful number, since it uses less digits than its factorization.

20212221200022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151600834 (or 151600825 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20212221200022 its reverse (22000212221202), we get a palindrome (42212433421224).

The spelling of 20212221200022 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-one million, two hundred thousand, twenty-two".