121311120001031 has 2 divisors, whose sum is σ = 121311120001032. Its totient is φ = 121311120001030.

The previous prime is 121311120001007. The next prime is 121311120001033. The reversal of 121311120001031 is 130100021113121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121311120001031 - 2²⁶ = 121311052892167 is a prime.

It is a super-2 number, since 2×121311120001031² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 121311120001033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121311120001033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655560000515 + 60655560000516.

It is an arithmetic number, because the mean of its divisors is an integer number (60655560000516).

Almost surely, 2^{121311120001031} is an apocalyptic number.

121311120001031 is a deficient number, since it is larger than the sum of its proper divisors (1).

121311120001031 is an equidigital number, since it uses as much as digits as its factorization.

121311120001031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 121311120001031 its reverse (130100021113121), we get a palindrome (251411141114152).

The spelling of 121311120001031 in words is "one hundred twenty-one trillion, three hundred eleven billion, one hundred twenty million, one thousand, thirty-one".