111014909721 has 15 divisors (see below), whose sum is σ = 165841567023. Its totient is φ = 74007940680.

The previous prime is 111014909711. The next prime is 111014909771. The reversal of 111014909721 is 127909410111.

It is a happy number.

The square root of 111014909721 is 333189.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9852746121 + 101162163600 = 99261^2 + 318060^2 .

It is not a de Polignac number, because 111014909721 - 2¹¹ = 111014907673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111014909711) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2980191 + ... + 3017211.

Almost surely, 2^111014909721 is an apocalyptic number.

111014909721 is the 333189-th square number.

111014909721 is the 166595-th centered octagonal number.

It is an amenable number.

111014909721 is a deficient number, since it is larger than the sum of its proper divisors (54826657302).

111014909721 is an frugal number, since it uses more digits than its factorization.

111014909721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74054 (or 37024 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

Multiplying 111014909721 by its sum of digits (36), we get a square (3996536749956 = 1999134²).

The spelling of 111014909721 in words is "one hundred eleven billion, fourteen million, nine hundred nine thousand, seven hundred twenty-one".