121131231945797 has 2 divisors, whose sum is σ = 121131231945798. Its totient is φ = 121131231945796.

The previous prime is 121131231945751. The next prime is 121131231945803. The reversal of 121131231945797 is 797549132131121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88434632952961 + 32696598992836 = 9403969^2 + 5718094^2 .

It is a cyclic number.

It is not a de Polignac number, because 121131231945797 - 2⁶ = 121131231945733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121131231945707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60565615972898 + 60565615972899.

It is an arithmetic number, because the mean of its divisors is an integer number (60565615972899).

Almost surely, 2^{121131231945797} is an apocalyptic number.

It is an amenable number.

121131231945797 is a deficient number, since it is larger than the sum of its proper divisors (1).

121131231945797 is an equidigital number, since it uses as much as digits as its factorization.

121131231945797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 56.

The spelling of 121131231945797 in words is "one hundred twenty-one trillion, one hundred thirty-one billion, two hundred thirty-one million, nine hundred forty-five thousand, seven hundred ninety-seven".