111203121013 has 4 divisors (see below), whose sum is σ = 111553919820. Its totient is φ = 110852322208.

The previous prime is 111203120993. The next prime is 111203121019. The reversal of 111203121013 is 310121302111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310121302111 = 8753 ⋅35430287.

It can be written as a sum of positive squares in 2 ways, for example, as 61195874884 + 50007246129 = 247378^2 + 223623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111203121013 is a prime.

It is a super-2 number, since 2×111203121013² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111203121019) 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, 175398928 + ... + 175399561.

It is an arithmetic number, because the mean of its divisors is an integer number (27888479955).

Almost surely, 2^111203121013 is an apocalyptic number.

It is an amenable number.

111203121013 is a deficient number, since it is larger than the sum of its proper divisors (350798807).

111203121013 is an equidigital number, since it uses as much as digits as its factorization.

111203121013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350798806.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 111203121013 its reverse (310121302111), we get a palindrome (421324423124).

The spelling of 111203121013 in words is "one hundred eleven billion, two hundred three million, one hundred twenty-one thousand, thirteen".