111420137 has 2 divisors, whose sum is σ = 111420138. Its totient is φ = 111420136.

The previous prime is 111420109. The next prime is 111420139. The reversal of 111420137 is 731024111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99420841 + 11999296 = 9971^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 111420137 - 2¹⁴ = 111403753 is a prime.

Together with 111420139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111420139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55710068 + 55710069.

It is an arithmetic number, because the mean of its divisors is an integer number (55710069).

Almost surely, 2^111420137 is an apocalyptic number.

It is an amenable number.

111420137 is a deficient number, since it is larger than the sum of its proper divisors (1).

111420137 is an equidigital number, since it uses as much as digits as its factorization.

111420137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 111420137 is about 10555.5737409200. The cubic root of 111420137 is about 481.1951366703.

Adding to 111420137 its reverse (731024111), we get a palindrome (842444248).

The spelling of 111420137 in words is "one hundred eleven million, four hundred twenty thousand, one hundred thirty-seven".