121323100111 has 2 divisors, whose sum is σ = 121323100112. Its totient is φ = 121323100110.

The previous prime is 121323100081. The next prime is 121323100117. The reversal of 121323100111 is 111001323121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121323100111 - 2³⁵ = 86963361743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121323100117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60661550055 + 60661550056.

It is an arithmetic number, because the mean of its divisors is an integer number (60661550056).

Almost surely, 2^121323100111 is an apocalyptic number.

121323100111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121323100111 is an equidigital number, since it uses as much as digits as its factorization.

121323100111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121323100111 its reverse (111001323121), we get a palindrome (232324423232).

The spelling of 121323100111 in words is "one hundred twenty-one billion, three hundred twenty-three million, one hundred thousand, one hundred eleven".