121323231213 has 16 divisors (see below), whose sum is σ = 171865159680. Its totient is φ = 75982487616.

The previous prime is 121323231209. The next prime is 121323231221. The reversal of 121323231213 is 312132323121.

It is not a de Polignac number, because 121323231213 - 2² = 121323231209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121323231223) 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, 18841645 + ... + 18848082.

It is an arithmetic number, because the mean of its divisors is an integer number (10741572480).

Almost surely, 2^121323231213 is an apocalyptic number.

It is an amenable number.

121323231213 is a deficient number, since it is larger than the sum of its proper divisors (50541928467).

121323231213 is a wasteful number, since it uses less digits than its factorization.

121323231213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37689796.

The product of its digits is 1296, while the sum is 24.

Adding to 121323231213 its reverse (312132323121), we get a palindrome (433455554334).

It can be divided in two parts, 12132323121 and 3, that multiplied together give a palindrome (36396969363).

The spelling of 121323231213 in words is "one hundred twenty-one billion, three hundred twenty-three million, two hundred thirty-one thousand, two hundred thirteen".