121122331213 has 4 divisors (see below), whose sum is σ = 130439433628. Its totient is φ = 111805228800.

The previous prime is 121122331177. The next prime is 121122331249. The reversal of 121122331213 is 312133221121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (121122331177) and next prime (121122331249).

It can be written as a sum of positive squares in 2 ways, for example, as 67806597609 + 53315733604 = 260397^2 + 230902^2 .

It is a cyclic number.

It is not a de Polignac number, because 121122331213 - 2⁹ = 121122330701 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 (121122331273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4658551188 + ... + 4658551213.

It is an arithmetic number, because the mean of its divisors is an integer number (32609858407).

Almost surely, 2^121122331213 is an apocalyptic number.

121122331213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121122331213 is a deficient number, since it is larger than the sum of its proper divisors (9317102415).

121122331213 is an equidigital number, since it uses as much as digits as its factorization.

121122331213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9317102414.

The product of its digits is 432, while the sum is 22.

Adding to 121122331213 its reverse (312133221121), we get a palindrome (433255552334).

The spelling of 121122331213 in words is "one hundred twenty-one billion, one hundred twenty-two million, three hundred thirty-one thousand, two hundred thirteen".