121110013 has 4 divisors (see below), whose sum is σ = 121312800. Its totient is φ = 120907228.

The previous prime is 121109959. The next prime is 121110037. The reversal of 121110013 is 310011121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310011121 = 7 ⋅44287303.

It is a cyclic number.

It is not a de Polignac number, because 121110013 - 2⁹ = 121109501 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 (121110113) 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, 100495 + ... + 101692.

It is an arithmetic number, because the mean of its divisors is an integer number (30328200).

Almost surely, 2^121110013 is an apocalyptic number.

It is an amenable number.

121110013 is a deficient number, since it is larger than the sum of its proper divisors (202787).

121110013 is an equidigital number, since it uses as much as digits as its factorization.

121110013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202786.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 121110013 is about 11004.9994547933. Note that the first 3 decimals coincide. The cubic root of 121110013 is about 494.7585980694.

Adding to 121110013 its reverse (310011121), we get a palindrome (431121134).

The spelling of 121110013 in words is "one hundred twenty-one million, one hundred ten thousand, thirteen".