111513542021 has 8 divisors (see below), whose sum is σ = 127500884544. Its totient is φ = 95540408640.

The previous prime is 111513542011. The next prime is 111513542047. The reversal of 111513542021 is 120245315111.

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 111513542021 - 2¹⁰ = 111513540997 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 (111513542011) 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, 3535460 + ... + 3566861.

It is an arithmetic number, because the mean of its divisors is an integer number (15937610568).

Almost surely, 2^111513542021 is an apocalyptic number.

It is an amenable number.

111513542021 is a deficient number, since it is larger than the sum of its proper divisors (15987342523).

111513542021 is an equidigital number, since it uses as much as digits as its factorization.

111513542021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7104571.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 111513542021 its reverse (120245315111), we get a palindrome (231758857132).

The spelling of 111513542021 in words is "one hundred eleven billion, five hundred thirteen million, five hundred forty-two thousand, twenty-one".