121212334213 has 4 divisors (see below), whose sum is σ = 121218436960. Its totient is φ = 121206231468.

The previous prime is 121212334189. The next prime is 121212334301. The reversal of 121212334213 is 312433212121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121212334213 - 2⁵ = 121212334181 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 (121212334513) 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, 3021483 + ... + 3061336.

It is an arithmetic number, because the mean of its divisors is an integer number (30304609240).

Almost surely, 2^121212334213 is an apocalyptic number.

It is an amenable number.

121212334213 is a deficient number, since it is larger than the sum of its proper divisors (6102747).

121212334213 is an equidigital number, since it uses as much as digits as its factorization.

121212334213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6102746.

The product of its digits is 1728, while the sum is 25.

Adding to 121212334213 its reverse (312433212121), we get a palindrome (433645546334).

The spelling of 121212334213 in words is "one hundred twenty-one billion, two hundred twelve million, three hundred thirty-four thousand, two hundred thirteen".