231231120089 has 2 divisors, whose sum is σ = 231231120090. Its totient is φ = 231231120088.

The previous prime is 231231120041. The next prime is 231231120139. The reversal of 231231120089 is 980021132132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198017880064 + 33213240025 = 444992^2 + 182245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231231120089 is a prime.

It is a super-2 number, since 2×231231120089² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231231120889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115615560044 + 115615560045.

It is an arithmetic number, because the mean of its divisors is an integer number (115615560045).

Almost surely, 2^231231120089 is an apocalyptic number.

It is an amenable number.

231231120089 is a deficient number, since it is larger than the sum of its proper divisors (1).

231231120089 is an equidigital number, since it uses as much as digits as its factorization.

231231120089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 231231120089 in words is "two hundred thirty-one billion, two hundred thirty-one million, one hundred twenty thousand, eighty-nine".