20000212221121 has 16 divisors (see below), whose sum is σ = 21909485424960. Its totient is φ = 18106264653120.

The previous prime is 20000212221047. The next prime is 20000212221181. The reversal of 20000212221121 is 12112221200002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20000212221121 - 2⁹ = 20000212220609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000212221095 and 20000212221104.

It is not an unprimeable number, because it can be changed into a prime (20000212221181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950970 + ... + 6395683.

It is an arithmetic number, because the mean of its divisors is an integer number (1369342839060).

Almost surely, 2^{20000212221121} is an apocalyptic number.

It is an amenable number.

20000212221121 is a deficient number, since it is larger than the sum of its proper divisors (1909273203839).

20000212221121 is a wasteful number, since it uses less digits than its factorization.

20000212221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7347696.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20000212221121 its reverse (12112221200002), we get a palindrome (32112433421123).

The spelling of 20000212221121 in words is "twenty trillion, two hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".