121352599691 has 2 divisors, whose sum is σ = 121352599692. Its totient is φ = 121352599690.

The previous prime is 121352599679. The next prime is 121352599699. The reversal of 121352599691 is 196995253121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121352599691 - 2²⁶ = 121285490827 is a prime.

It is not a weakly prime, because it can be changed into another prime (121352599699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60676299845 + 60676299846.

It is an arithmetic number, because the mean of its divisors is an integer number (60676299846).

Almost surely, 2^121352599691 is an apocalyptic number.

121352599691 is a deficient number, since it is larger than the sum of its proper divisors (1).

121352599691 is an equidigital number, since it uses as much as digits as its factorization.

121352599691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1312200, while the sum is 53.

The spelling of 121352599691 in words is "one hundred twenty-one billion, three hundred fifty-two million, five hundred ninety-nine thousand, six hundred ninety-one".