111461921 has 2 divisors, whose sum is σ = 111461922. Its totient is φ = 111461920.

The previous prime is 111461899. The next prime is 111461929. The reversal of 111461921 is 129164111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71910400 + 39551521 = 8480^2 + 6289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111461921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111461929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55730960 + 55730961.

It is an arithmetic number, because the mean of its divisors is an integer number (55730961).

Almost surely, 2^111461921 is an apocalyptic number.

It is an amenable number.

111461921 is a deficient number, since it is larger than the sum of its proper divisors (1).

111461921 is an equidigital number, since it uses as much as digits as its factorization.

111461921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 26.

The square root of 111461921 is about 10557.5527940901. The cubic root of 111461921 is about 481.2552806302.

The spelling of 111461921 in words is "one hundred eleven million, four hundred sixty-one thousand, nine hundred twenty-one".