111199001257 has 4 divisors (see below), whose sum is σ = 117740118996. Its totient is φ = 104657883520.

The previous prime is 111199001113. The next prime is 111199001269. The reversal of 111199001257 is 752100991111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752100991111 = 193 ⋅3896896327.

It can be written as a sum of positive squares in 2 ways, for example, as 87131822761 + 24067178496 = 295181^2 + 155136^2 .

It is a cyclic number.

It is not a de Polignac number, because 111199001257 - 2¹⁹ = 111198476969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111199001297) 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, 3270558844 + ... + 3270558877.

It is an arithmetic number, because the mean of its divisors is an integer number (29435029749).

Almost surely, 2^111199001257 is an apocalyptic number.

111199001257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

111199001257 is a deficient number, since it is larger than the sum of its proper divisors (6541117739).

111199001257 is an equidigital number, since it uses as much as digits as its factorization.

111199001257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541117738.

The product of its (nonzero) digits is 5670, while the sum is 37.

Adding to 111199001257 its reverse (752100991111), we get a palindrome (863299992368).

The spelling of 111199001257 in words is "one hundred eleven billion, one hundred ninety-nine million, one thousand, two hundred fifty-seven".