111132221257 has 2 divisors, whose sum is σ = 111132221258. Its totient is φ = 111132221256.

The previous prime is 111132221203. The next prime is 111132221281. The reversal of 111132221257 is 752122231111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110443893561 + 688327696 = 332331^2 + 26236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111132221257 is a prime.

It is not a weakly prime, because it can be changed into another prime (111132221957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55566110628 + 55566110629.

It is an arithmetic number, because the mean of its divisors is an integer number (55566110629).

Almost surely, 2^111132221257 is an apocalyptic number.

It is an amenable number.

111132221257 is a deficient number, since it is larger than the sum of its proper divisors (1).

111132221257 is an equidigital number, since it uses as much as digits as its factorization.

111132221257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 28.

Adding to 111132221257 its reverse (752122231111), we get a palindrome (863254452368).

The spelling of 111132221257 in words is "one hundred eleven billion, one hundred thirty-two million, two hundred twenty-one thousand, two hundred fifty-seven".