111110120421437 has 2 divisors, whose sum is σ = 111110120421438. Its totient is φ = 111110120421436.

The previous prime is 111110120421407. The next prime is 111110120421457. The reversal of 111110120421437 is 734124021011111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56999766932761 + 54110353488676 = 7549819^2 + 7355974^2 .

It is a cyclic number.

It is not a de Polignac number, because 111110120421437 - 2²⁸ = 111109851985981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111110120421407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555060210718 + 55555060210719.

It is an arithmetic number, because the mean of its divisors is an integer number (55555060210719).

Almost surely, 2^{111110120421437} is an apocalyptic number.

It is an amenable number.

111110120421437 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110120421437 is an equidigital number, since it uses as much as digits as its factorization.

111110120421437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 29.

Adding to 111110120421437 its reverse (734124021011111), we get a palindrome (845234141432548).

The spelling of 111110120421437 in words is "one hundred eleven trillion, one hundred ten billion, one hundred twenty million, four hundred twenty-one thousand, four hundred thirty-seven".