111049921 has 2 divisors, whose sum is σ = 111049922. Its totient is φ = 111049920.

The previous prime is 111049907. The next prime is 111049931. The reversal of 111049921 is 129940111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79014321 + 32035600 = 8889^2 + 5660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111049921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111049921.

It is not a weakly prime, because it can be changed into another prime (111049901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55524960 + 55524961.

It is an arithmetic number, because the mean of its divisors is an integer number (55524961).

Almost surely, 2^111049921 is an apocalyptic number.

It is an amenable number.

111049921 is a deficient number, since it is larger than the sum of its proper divisors (1).

111049921 is an equidigital number, since it uses as much as digits as its factorization.

111049921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 111049921 is about 10538.0226323538. The cubic root of 111049921 is about 480.6615891524.

It can be divided in two parts, 11104 and 9921, that added together give a square (21025 = 145²).

The spelling of 111049921 in words is "one hundred eleven million, forty-nine thousand, nine hundred twenty-one".