20000232121 has 4 divisors (see below), whose sum is σ = 20100736000. Its totient is φ = 19899728244.

The previous prime is 20000232113. The next prime is 20000232139. The reversal of 20000232121 is 12123200002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20000232121 - 2³ = 20000232113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20000236121) 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, 50251641 + ... + 50252038.

It is an arithmetic number, because the mean of its divisors is an integer number (5025184000).

Almost surely, 2^20000232121 is an apocalyptic number.

It is an amenable number.

20000232121 is a deficient number, since it is larger than the sum of its proper divisors (100503879).

20000232121 is a wasteful number, since it uses less digits than its factorization.

20000232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100503878.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20000232121 its reverse (12123200002), we get a palindrome (32123432123).

The spelling of 20000232121 in words is "twenty billion, two hundred thirty-two thousand, one hundred twenty-one".