20133011231 has 2 divisors, whose sum is σ = 20133011232. Its totient is φ = 20133011230.

The previous prime is 20133011219. The next prime is 20133011237. The reversal of 20133011231 is 13211033102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20133011231 - 2³⁴ = 2953142047 is a prime.

It is a super-2 number, since 2×20133011231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20133011237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066505615 + 10066505616.

It is an arithmetic number, because the mean of its divisors is an integer number (10066505616).

Almost surely, 2^20133011231 is an apocalyptic number.

20133011231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20133011231 is an equidigital number, since it uses as much as digits as its factorization.

20133011231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20133011231 its reverse (13211033102), we get a palindrome (33344044333).

The spelling of 20133011231 in words is "twenty billion, one hundred thirty-three million, eleven thousand, two hundred thirty-one".