121312011103391 has 2 divisors, whose sum is σ = 121312011103392. Its totient is φ = 121312011103390.

The previous prime is 121312011103357. The next prime is 121312011103421. The reversal of 121312011103391 is 193301110213121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121312011103391 is a prime.

It is a super-2 number, since 2×121312011103391² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121312011103321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656005551695 + 60656005551696.

It is an arithmetic number, because the mean of its divisors is an integer number (60656005551696).

Almost surely, 2^{121312011103391} is an apocalyptic number.

121312011103391 is a deficient number, since it is larger than the sum of its proper divisors (1).

121312011103391 is an equidigital number, since it uses as much as digits as its factorization.

121312011103391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 121312011103391 in words is "one hundred twenty-one trillion, three hundred twelve billion, eleven million, one hundred three thousand, three hundred ninety-one".