123213011321111 has 2 divisors, whose sum is σ = 123213011321112. Its totient is φ = 123213011321110.

The previous prime is 123213011321047. The next prime is 123213011321123. The reversal of 123213011321111 is 111123110312321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123213011321111 - 2⁶ = 123213011321047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123213011371111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61606505660555 + 61606505660556.

It is an arithmetic number, because the mean of its divisors is an integer number (61606505660556).

Almost surely, 2^{123213011321111} is an apocalyptic number.

123213011321111 is a deficient number, since it is larger than the sum of its proper divisors (1).

123213011321111 is an equidigital number, since it uses as much as digits as its factorization.

123213011321111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 123213011321111 its reverse (111123110312321), we get a palindrome (234336121633432).

The spelling of 123213011321111 in words is "one hundred twenty-three trillion, two hundred thirteen billion, eleven million, three hundred twenty-one thousand, one hundred eleven".