121123131431 has 2 divisors, whose sum is σ = 121123131432. Its totient is φ = 121123131430.

The previous prime is 121123131427. The next prime is 121123131443. The reversal of 121123131431 is 134131321121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121123131431 - 2² = 121123131427 is a prime.

It is a super-2 number, since 2×121123131431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121123131397 and 121123131406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121123131491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60561565715 + 60561565716.

It is an arithmetic number, because the mean of its divisors is an integer number (60561565716).

Almost surely, 2^121123131431 is an apocalyptic number.

121123131431 is a deficient number, since it is larger than the sum of its proper divisors (1).

121123131431 is an equidigital number, since it uses as much as digits as its factorization.

121123131431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

Adding to 121123131431 its reverse (134131321121), we get a palindrome (255254452552).

The spelling of 121123131431 in words is "one hundred twenty-one billion, one hundred twenty-three million, one hundred thirty-one thousand, four hundred thirty-one".