121012010112991 has 2 divisors, whose sum is σ = 121012010112992. Its totient is φ = 121012010112990.

The previous prime is 121012010112949. The next prime is 121012010113009. The reversal of 121012010112991 is 199211010210121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121012010112991 - 2³⁷ = 120874571159519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121012010112911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506005056495 + 60506005056496.

It is an arithmetic number, because the mean of its divisors is an integer number (60506005056496).

Almost surely, 2^{121012010112991} is an apocalyptic number.

121012010112991 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012010112991 is an equidigital number, since it uses as much as digits as its factorization.

121012010112991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 31.

The spelling of 121012010112991 in words is "one hundred twenty-one trillion, twelve billion, ten million, one hundred twelve thousand, nine hundred ninety-one".