111829379281 has 9 divisors (see below), whose sum is σ = 112537747569. Its totient is φ = 111125448336.

The previous prime is 111829379267. The next prime is 111829379327. The reversal of 111829379281 is 182973928111.

The square root of 111829379281 is 334409.

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

It can be written as a sum of positive squares in 4 ways, for example, as 42597244881 + 69232134400 = 206391^2 + 263120^2 .

It is not a de Polignac number, because 111829379281 - 2²¹ = 111827282129 is a prime.

It is a super-2 number, since 2×111829379281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111829329281) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 57851791 + ... + 57853723.

Almost surely, 2^111829379281 is an apocalyptic number.

111829379281 is the 334409-th square number.

111829379281 is the 167205-th centered octagonal number.

It is an amenable number.

111829379281 is a deficient number, since it is larger than the sum of its proper divisors (708368288).

111829379281 is an frugal number, since it uses more digits than its factorization.

111829379281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212 (or 2106 counting only the distinct ones).

The product of its digits is 435456, while the sum is 52.

The spelling of 111829379281 in words is "one hundred eleven billion, eight hundred twenty-nine million, three hundred seventy-nine thousand, two hundred eighty-one".