111906127898 has 4 divisors (see below), whose sum is σ = 167859191850. Its totient is φ = 55953063948.

The previous prime is 111906127871. The next prime is 111906127951. The reversal of 111906127898 is 898721609111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 898721609111 = 335009 ⋅2682679.

It can be written as a sum of positive squares in only one way, i.e., 97127592409 + 14778535489 = 311653^2 + 121567^2 .

It is a super-2 number, since 2×111906127898² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27976531973 + ... + 27976531976.

Almost surely, 2^111906127898 is an apocalyptic number.

111906127898 is a deficient number, since it is larger than the sum of its proper divisors (55953063952).

111906127898 is an equidigital number, since it uses as much as digits as its factorization.

111906127898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55953063951.

The product of its (nonzero) digits is 435456, while the sum is 53.

The spelling of 111906127898 in words is "one hundred eleven billion, nine hundred six million, one hundred twenty-seven thousand, eight hundred ninety-eight".