111711401 has 2 divisors, whose sum is σ = 111711402. Its totient is φ = 111711400.

The previous prime is 111711373. The next prime is 111711419. The reversal of 111711401 is 104117111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79210000 + 32501401 = 8900^2 + 5701^2 .

It is a cyclic number.

It is not a de Polignac number, because 111711401 - 2⁶ = 111711337 is a prime.

It is a super-2 number, since 2×111711401² = 24958874226765602, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111711401.

It is not a weakly prime, because it can be changed into another prime (111711421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55855700 + 55855701.

It is an arithmetic number, because the mean of its divisors is an integer number (55855701).

Almost surely, 2^111711401 is an apocalyptic number.

It is an amenable number.

111711401 is a deficient number, since it is larger than the sum of its proper divisors (1).

111711401 is an equidigital number, since it uses as much as digits as its factorization.

111711401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 17.

The square root of 111711401 is about 10569.3614282037. The cubic root of 111711401 is about 481.6140701313.

Adding to 111711401 its reverse (104117111), we get a palindrome (215828512).

The spelling of 111711401 in words is "one hundred eleven million, seven hundred eleven thousand, four hundred one".