121215424213 has 32 divisors (see below), whose sum is σ = 134483328000. Its totient is φ = 108555684096.

The previous prime is 121215424189. The next prime is 121215424229. The reversal of 121215424213 is 312424512121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121215424213 - 2⁹ = 121215423701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121215424273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59447448 + ... + 59449486.

It is an arithmetic number, because the mean of its divisors is an integer number (4202604000).

Almost surely, 2^121215424213 is an apocalyptic number.

121215424213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121215424213 is a deficient number, since it is larger than the sum of its proper divisors (13267903787).

121215424213 is a wasteful number, since it uses less digits than its factorization.

121215424213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901.

The product of its digits is 3840, while the sum is 28.

Adding to 121215424213 its reverse (312424512121), we get a palindrome (433639936334).

The spelling of 121215424213 in words is "one hundred twenty-one billion, two hundred fifteen million, four hundred twenty-four thousand, two hundred thirteen".