121312110211 has 8 divisors (see below), whose sum is σ = 128725550784. Its totient is φ = 113929495680.

The previous prime is 121312110191. The next prime is 121312110229. The reversal of 121312110211 is 112011213121.

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 121312110211 - 2²⁵ = 121278555779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121312110011) 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, 7698400 + ... + 7714141.

It is an arithmetic number, because the mean of its divisors is an integer number (16090693848).

Almost surely, 2^121312110211 is an apocalyptic number.

121312110211 is a deficient number, since it is larger than the sum of its proper divisors (7413440573).

121312110211 is a wasteful number, since it uses less digits than its factorization.

121312110211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15413021.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 121312110211 its reverse (112011213121), we get a palindrome (233323323332).

The spelling of 121312110211 in words is "one hundred twenty-one billion, three hundred twelve million, one hundred ten thousand, two hundred eleven".