121302131499 has 20 divisors (see below), whose sum is σ = 181995732160. Its totient is φ = 80514939600.

The previous prime is 121302131479. The next prime is 121302131521. The reversal of 121302131499 is 994131203121.

It is a happy number.

121302131499 is a `hidden beast` number, since 1 + 2 + 1 + 30 + 2 + 131 + 499 = 666.

It is not a de Polignac number, because 121302131499 - 2²³ = 121293742891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121302131459) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3251227 + ... + 3288324.

It is an arithmetic number, because the mean of its divisors is an integer number (9099786608).

Almost surely, 2^121302131499 is an apocalyptic number.

121302131499 is a deficient number, since it is larger than the sum of its proper divisors (60693600661).

121302131499 is an equidigital number, since it uses as much as digits as its factorization.

121302131499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6539792 (or 6539783 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 121302131499 in words is "one hundred twenty-one billion, three hundred two million, one hundred thirty-one thousand, four hundred ninety-nine".