20000222121021 has 32 divisors (see below), whose sum is σ = 27839937565440. Its totient is φ = 12747560179200.

The previous prime is 20000222120969. The next prime is 20000222121071. The reversal of 20000222121021 is 12012122200002.

It is a de Polignac number, because none of the positive numbers 2^k-20000222121021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000222121071) 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, 1721035591 + ... + 1721047211.

It is an arithmetic number, because the mean of its divisors is an integer number (869998048920).

Almost surely, 2^{20000222121021} is an apocalyptic number.

It is an amenable number.

20000222121021 is a deficient number, since it is larger than the sum of its proper divisors (7839715444419).

20000222121021 is a wasteful number, since it uses less digits than its factorization.

20000222121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21637.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20000222121021 its reverse (12012122200002), we get a palindrome (32012344321023).

The spelling of 20000222121021 in words is "twenty trillion, two hundred twenty-two million, one hundred twenty-one thousand, twenty-one".