121232213213 has 2 divisors, whose sum is σ = 121232213214. Its totient is φ = 121232213212.

The previous prime is 121232213171. The next prime is 121232213269. The reversal of 121232213213 is 312312232121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86828640889 + 34403572324 = 294667^2 + 185482^2 .

It is a cyclic number.

It is not a de Polignac number, because 121232213213 - 2⁶ = 121232213149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121232213813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60616106606 + 60616106607.

It is an arithmetic number, because the mean of its divisors is an integer number (60616106607).

Almost surely, 2^121232213213 is an apocalyptic number.

It is an amenable number.

121232213213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121232213213 is an equidigital number, since it uses as much as digits as its factorization.

121232213213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

Adding to 121232213213 its reverse (312312232121), we get a palindrome (433544445334).

The spelling of 121232213213 in words is "one hundred twenty-one billion, two hundred thirty-two million, two hundred thirteen thousand, two hundred thirteen".