20123331331 has 2 divisors, whose sum is σ = 20123331332. Its totient is φ = 20123331330.

The previous prime is 20123331311. The next prime is 20123331337. The reversal of 20123331331 is 13313332102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20123331331 - 2⁹ = 20123330819 is a prime.

It is a super-2 number, since 2×20123331331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20123331337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061665665 + 10061665666.

It is an arithmetic number, because the mean of its divisors is an integer number (10061665666).

Almost surely, 2^20123331331 is an apocalyptic number.

20123331331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123331331 is an equidigital number, since it uses as much as digits as its factorization.

20123331331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 20123331331 its reverse (13313332102), we get a palindrome (33436663433).

The spelling of 20123331331 in words is "twenty billion, one hundred twenty-three million, three hundred thirty-one thousand, three hundred thirty-one".