20120233121 has 2 divisors, whose sum is σ = 20120233122. Its totient is φ = 20120233120.

The previous prime is 20120233097. The next prime is 20120233151. The reversal of 20120233121 is 12133202102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18361605025 + 1758628096 = 135505^2 + 41936^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120233121 - 2²⁶ = 20053124257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20120233121.

It is not a weakly prime, because it can be changed into another prime (20120233151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060116560 + 10060116561.

It is an arithmetic number, because the mean of its divisors is an integer number (10060116561).

Almost surely, 2^20120233121 is an apocalyptic number.

It is an amenable number.

20120233121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120233121 is an equidigital number, since it uses as much as digits as its factorization.

20120233121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20120233121 its reverse (12133202102), we get a palindrome (32253435223).

The spelling of 20120233121 in words is "twenty billion, one hundred twenty million, two hundred thirty-three thousand, one hundred twenty-one".