121215900013814 has 16 divisors (see below), whose sum is σ = 188094215383200. Its totient is φ = 58517841051264.

The previous prime is 121215900013811. The next prime is 121215900013853. The reversal of 121215900013814 is 418310009512121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121215900013811) 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, 16928279 + ... + 22999965.

It is an arithmetic number, because the mean of its divisors is an integer number (11755888461450).

Almost surely, 2^{121215900013814} is an apocalyptic number.

121215900013814 is a deficient number, since it is larger than the sum of its proper divisors (66878315369386).

121215900013814 is a wasteful number, since it uses less digits than its factorization.

121215900013814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6415927.

The product of its (nonzero) digits is 17280, while the sum is 38.

Adding to 121215900013814 its reverse (418310009512121), we get a palindrome (539525909525935).

The spelling of 121215900013814 in words is "one hundred twenty-one trillion, two hundred fifteen billion, nine hundred million, thirteen thousand, eight hundred fourteen".