111121200013 has 4 divisors (see below), whose sum is σ = 111334484988. Its totient is φ = 110907915040.

The previous prime is 111121199977. The next prime is 111121200041. The reversal of 111121200013 is 310002121111.

It is a happy number.

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 83644159369 + 27477040644 = 289213^2 + 165762^2 .

It is a cyclic number.

It is not a de Polignac number, because 111121200013 - 2¹³ = 111121191821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111121199966 and 111121200002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121200053) 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, 106641706 + ... + 106642747.

It is an arithmetic number, because the mean of its divisors is an integer number (27833621247).

Almost surely, 2^111121200013 is an apocalyptic number.

It is an amenable number.

111121200013 is a deficient number, since it is larger than the sum of its proper divisors (213284975).

111121200013 is an equidigital number, since it uses as much as digits as its factorization.

111121200013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213284974.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 111121200013 its reverse (310002121111), we get a palindrome (421123321124).

The spelling of 111121200013 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred thousand, thirteen".