121111122210013 has 4 divisors (see below), whose sum is σ = 130427362380028. Its totient is φ = 111794882040000.

The previous prime is 121111122209837. The next prime is 121111122210059. The reversal of 121111122210013 is 310012221111121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26588646590724 + 94522475619289 = 5156418^2 + 9722267^2 .

It is a cyclic number.

It is not a de Polignac number, because 121111122210013 - 2¹³ = 121111122201821 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 (121111122210313) 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, 4658120084988 + ... + 4658120085013.

It is an arithmetic number, because the mean of its divisors is an integer number (32606840595007).

Almost surely, 2^{121111122210013} is an apocalyptic number.

121111122210013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121111122210013 is a deficient number, since it is larger than the sum of its proper divisors (9316240170015).

121111122210013 is an equidigital number, since it uses as much as digits as its factorization.

121111122210013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9316240170014.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 121111122210013 its reverse (310012221111121), we get a palindrome (431123343321134).

The spelling of 121111122210013 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred twenty-two million, two hundred ten thousand, thirteen".