231120421439 has 2 divisors, whose sum is σ = 231120421440. Its totient is φ = 231120421438.

The previous prime is 231120421423. The next prime is 231120421459. The reversal of 231120421439 is 934124021132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231120421439 - 2⁴ = 231120421423 is a prime.

It is a super-2 number, since 2×231120421439² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231120421459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115560210719 + 115560210720.

It is an arithmetic number, because the mean of its divisors is an integer number (115560210720).

Almost surely, 2^231120421439 is an apocalyptic number.

231120421439 is a deficient number, since it is larger than the sum of its proper divisors (1).

231120421439 is an equidigital number, since it uses as much as digits as its factorization.

231120421439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 231120421439 in words is "two hundred thirty-one billion, one hundred twenty million, four hundred twenty-one thousand, four hundred thirty-nine".