111275481381 has 4 divisors (see below), whose sum is σ = 148367308512. Its totient is φ = 74183654252.

The previous prime is 111275481379. The next prime is 111275481397. The reversal of 111275481381 is 183184572111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111275481381 - 2¹ = 111275481379 is a prime.

It is a super-2 number, since 2×111275481381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111275481311) 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, 18545913561 + ... + 18545913566.

It is an arithmetic number, because the mean of its divisors is an integer number (37091827128).

Almost surely, 2^111275481381 is an apocalyptic number.

It is an amenable number.

111275481381 is a deficient number, since it is larger than the sum of its proper divisors (37091827131).

111275481381 is an equidigital number, since it uses as much as digits as its factorization.

111275481381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37091827130.

The product of its digits is 53760, while the sum is 42.

The spelling of 111275481381 in words is "one hundred eleven billion, two hundred seventy-five million, four hundred eighty-one thousand, three hundred eighty-one".