111421307256 has 128 divisors (see below), whose sum is σ = 328317665280. Its totient is φ = 30849227136.

The previous prime is 111421307237. The next prime is 111421307267. The reversal of 111421307256 is 652703124111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 856725 + ... + 978171.

It is an arithmetic number, because the mean of its divisors is an integer number (2564981760).

Almost surely, 2^111421307256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111421307256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164158832640).

111421307256 is an abundant number, since it is smaller than the sum of its proper divisors (216896358024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111421307256 is a wasteful number, since it uses less digits than its factorization.

111421307256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121633 (or 121629 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 111421307256 in words is "one hundred eleven billion, four hundred twenty-one million, three hundred seven thousand, two hundred fifty-six".