111121012013 has 4 divisors (see below), whose sum is σ = 121222922208. Its totient is φ = 101019101820.

The previous prime is 111121011979. The next prime is 111121012021. The reversal of 111121012013 is 310210121111.

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.

It is a cyclic number.

It is not a de Polignac number, because 111121012013 - 2¹⁰ = 111121010989 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 (111121012063) 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, 5050955081 + ... + 5050955102.

It is an arithmetic number, because the mean of its divisors is an integer number (30305730552).

Almost surely, 2^111121012013 is an apocalyptic number.

It is an amenable number.

111121012013 is a deficient number, since it is larger than the sum of its proper divisors (10101910195).

111121012013 is a wasteful number, since it uses less digits than its factorization.

111121012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101910194.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 111121012013 its reverse (310210121111), we get a palindrome (421331133124).

The spelling of 111121012013 in words is "one hundred eleven billion, one hundred twenty-one million, twelve thousand, thirteen".