111125712551242 has 4 divisors (see below), whose sum is σ = 166688568826866. Its totient is φ = 55562856275620.

The previous prime is 111125712551201. The next prime is 111125712551279. The reversal of 111125712551242 is 242155217521111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 96818338216161 + 14307374335081 = 9839631^2 + 3782509^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111125712551195 and 111125712551204.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27781428137809 + ... + 27781428137812.

Almost surely, 2^{111125712551242} is an apocalyptic number.

111125712551242 is a deficient number, since it is larger than the sum of its proper divisors (55562856275624).

111125712551242 is an equidigital number, since it uses as much as digits as its factorization.

111125712551242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55562856275623.

The product of its digits is 56000, while the sum is 40.

The spelling of 111125712551242 in words is "one hundred eleven trillion, one hundred twenty-five billion, seven hundred twelve million, five hundred fifty-one thousand, two hundred forty-two".