13121120231 has 2 divisors, whose sum is σ = 13121120232. Its totient is φ = 13121120230.

The previous prime is 13121120119. The next prime is 13121120273. The reversal of 13121120231 is 13202112131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13121120231 - 2¹⁸ = 13120858087 is a prime.

It is a super-2 number, since 2×13121120231² (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 (13121120291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560560115 + 6560560116.

It is an arithmetic number, because the mean of its divisors is an integer number (6560560116).

Almost surely, 2^13121120231 is an apocalyptic number.

13121120231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13121120231 is an equidigital number, since it uses as much as digits as its factorization.

13121120231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13121120231 its reverse (13202112131), we get a palindrome (26323232362).

The spelling of 13121120231 in words is "thirteen billion, one hundred twenty-one million, one hundred twenty thousand, two hundred thirty-one".