111120021973 has 2 divisors, whose sum is σ = 111120021974. Its totient is φ = 111120021972.

The previous prime is 111120021967. The next prime is 111120022019. The reversal of 111120021973 is 379120021111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64811994724 + 46308027249 = 254582^2 + 215193^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120021973 - 2¹⁷ = 111119890901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111120021953) 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, 55560010986 + 55560010987.

It is an arithmetic number, because the mean of its divisors is an integer number (55560010987).

Almost surely, 2^111120021973 is an apocalyptic number.

It is an amenable number.

111120021973 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120021973 is an equidigital number, since it uses as much as digits as its factorization.

111120021973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 28.

The spelling of 111120021973 in words is "one hundred eleven billion, one hundred twenty million, twenty-one thousand, nine hundred seventy-three".