121351531099 has 2 divisors, whose sum is σ = 121351531100. Its totient is φ = 121351531098.

The previous prime is 121351531073. The next prime is 121351531127. The reversal of 121351531099 is 990135153121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121351531099 - 2³¹ = 119204047451 is a prime.

It is not a weakly prime, because it can be changed into another prime (121351531199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60675765549 + 60675765550.

It is an arithmetic number, because the mean of its divisors is an integer number (60675765550).

Almost surely, 2^121351531099 is an apocalyptic number.

121351531099 is a deficient number, since it is larger than the sum of its proper divisors (1).

121351531099 is an equidigital number, since it uses as much as digits as its factorization.

121351531099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450, while the sum is 40.

The spelling of 121351531099 in words is "one hundred twenty-one billion, three hundred fifty-one million, five hundred thirty-one thousand, ninety-nine".