121816481413 has 16 divisors (see below), whose sum is σ = 138163798080. Its totient is φ = 106428643200.

The previous prime is 121816481401. The next prime is 121816481467. The reversal of 121816481413 is 314184618121.

It is not a de Polignac number, because 121816481413 - 2¹³ = 121816473221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121816481513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1985478 + ... + 2045911.

It is an arithmetic number, because the mean of its divisors is an integer number (8635237380).

Almost surely, 2^121816481413 is an apocalyptic number.

It is an amenable number.

121816481413 is a deficient number, since it is larger than the sum of its proper divisors (16347316667).

121816481413 is a wasteful number, since it uses less digits than its factorization.

121816481413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031508.

The product of its digits is 36864, while the sum is 40.

The spelling of 121816481413 in words is "one hundred twenty-one billion, eight hundred sixteen million, four hundred eighty-one thousand, four hundred thirteen".