111434621 has 2 divisors, whose sum is σ = 111434622. Its totient is φ = 111434620.

The previous prime is 111434581. The next prime is 111434623. The reversal of 111434621 is 126434111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59752900 + 51681721 = 7730^2 + 7189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111434621 is a prime.

Together with 111434623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111434623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55717310 + 55717311.

It is an arithmetic number, because the mean of its divisors is an integer number (55717311).

Almost surely, 2^111434621 is an apocalyptic number.

It is an amenable number.

111434621 is a deficient number, since it is larger than the sum of its proper divisors (1).

111434621 is an equidigital number, since it uses as much as digits as its factorization.

111434621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 111434621 is about 10556.2598016532. The cubic root of 111434621 is about 481.2159866668.

Adding to 111434621 its reverse (126434111), we get a palindrome (237868732).

The spelling of 111434621 in words is "one hundred eleven million, four hundred thirty-four thousand, six hundred twenty-one".