121310129999 has 8 divisors (see below), whose sum is σ = 125499848160. Its totient is φ = 117120852576.

The previous prime is 121310129953. The next prime is 121310130013. The reversal of 121310129999 is 999921013121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121310129999 is a prime.

It is a super-2 number, since 2×121310129999² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121310129299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508829 + ... + 708185.

It is an arithmetic number, because the mean of its divisors is an integer number (15687481020).

Almost surely, 2^121310129999 is an apocalyptic number.

121310129999 is a deficient number, since it is larger than the sum of its proper divisors (4189718161).

121310129999 is a wasteful number, since it uses less digits than its factorization.

121310129999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220369.

The product of its (nonzero) digits is 78732, while the sum is 47.

The spelling of 121310129999 in words is "one hundred twenty-one billion, three hundred ten million, one hundred twenty-nine thousand, nine hundred ninety-nine".