121313252499 has 8 divisors (see below), whose sum is σ = 161753081280. Its totient is φ = 80874462696.

The previous prime is 121313252477. The next prime is 121313252503. The reversal of 121313252499 is 994252313121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121313252499 - 2¹⁹ = 121312728211 is a prime.

It is a super-2 number, since 2×121313252499² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121313252499.

It is not an unprimeable number, because it can be changed into a prime (121313252449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73944 + ... + 498090.

It is an arithmetic number, because the mean of its divisors is an integer number (20219135160).

Almost surely, 2^121313252499 is an apocalyptic number.

121313252499 is a deficient number, since it is larger than the sum of its proper divisors (40439828781).

121313252499 is an equidigital number, since it uses as much as digits as its factorization.

121313252499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519489.

The product of its digits is 116640, while the sum is 42.

The spelling of 121313252499 in words is "one hundred twenty-one billion, three hundred thirteen million, two hundred fifty-two thousand, four hundred ninety-nine".