121320312012111 has 16 divisors (see below), whose sum is σ = 161842057112160. Its totient is φ = 80839395479040.

The previous prime is 121320312012059. The next prime is 121320312012149. The reversal of 121320312012111 is 111210213023121.

It is not a de Polignac number, because 121320312012111 - 2³⁰ = 121319238270287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121320312012161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59829531 + ... + 61824051.

It is an arithmetic number, because the mean of its divisors is an integer number (10115128569510).

Almost surely, 2^{121320312012111} is an apocalyptic number.

121320312012111 is a deficient number, since it is larger than the sum of its proper divisors (40521745100049).

121320312012111 is a wasteful number, since it uses less digits than its factorization.

121320312012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004746.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 121320312012111 its reverse (111210213023121), we get a palindrome (232530525035232).

The spelling of 121320312012111 in words is "one hundred twenty-one trillion, three hundred twenty billion, three hundred twelve million, twelve thousand, one hundred eleven".