121312132031 has 2 divisors, whose sum is σ = 121312132032. Its totient is φ = 121312132030.

The previous prime is 121312132013. The next prime is 121312132033. The reversal of 121312132031 is 130231213121.

It is a happy number.

Together with previous prime (121312132013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121312132031 is a prime.

It is a super-2 number, since 2×121312132031² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 121312132033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121312131994 and 121312132012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121312132033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656066015 + 60656066016.

It is an arithmetic number, because the mean of its divisors is an integer number (60656066016).

Almost surely, 2^121312132031 is an apocalyptic number.

121312132031 is a deficient number, since it is larger than the sum of its proper divisors (1).

121312132031 is an equidigital number, since it uses as much as digits as its factorization.

121312132031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121312132031 its reverse (130231213121), we get a palindrome (251543345152).

The spelling of 121312132031 in words is "one hundred twenty-one billion, three hundred twelve million, one hundred thirty-two thousand, thirty-one".