111123021013 has 8 divisors (see below), whose sum is σ = 112236004760. Its totient is φ = 110011737600.

The previous prime is 111123020999. The next prime is 111123021017. The reversal of 111123021013 is 310120321111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17387850769 + 93735170244 = 131863^2 + 306162^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111123021013 - 2⁹ = 111123020501 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 (111123021017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293520 + ... + 555337.

It is an arithmetic number, because the mean of its divisors is an integer number (14029500595).

Almost surely, 2^111123021013 is an apocalyptic number.

It is an amenable number.

111123021013 is a deficient number, since it is larger than the sum of its proper divisors (1112983747).

111123021013 is a wasteful number, since it uses less digits than its factorization.

111123021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850167.

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

Adding to 111123021013 its reverse (310120321111), we get a palindrome (421243342124).

The spelling of 111123021013 in words is "one hundred eleven billion, one hundred twenty-three million, twenty-one thousand, thirteen".