111043921 has 2 divisors, whose sum is σ = 111043922. Its totient is φ = 111043920.

The previous prime is 111043879. The next prime is 111043937. The reversal of 111043921 is 129340111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109516225 + 1527696 = 10465^2 + 1236^2 .

It is a cyclic number.

It is not a de Polignac number, because 111043921 - 2⁹ = 111043409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111043892 and 111043901.

It is not a weakly prime, because it can be changed into another prime (111043421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55521960 + 55521961.

It is an arithmetic number, because the mean of its divisors is an integer number (55521961).

Almost surely, 2^111043921 is an apocalyptic number.

It is an amenable number.

111043921 is a deficient number, since it is larger than the sum of its proper divisors (1).

111043921 is an equidigital number, since it uses as much as digits as its factorization.

111043921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 111043921 is about 10537.7379451190. The cubic root of 111043921 is about 480.6529323205.

The spelling of 111043921 in words is "one hundred eleven million, forty-three thousand, nine hundred twenty-one".