1111020021973 has 2 divisors, whose sum is σ = 1111020021974. Its totient is φ = 1111020021972.

The previous prime is 1111020021953. The next prime is 1111020022087. The reversal of 1111020021973 is 3791200201111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1087750960209 + 23269061764 = 1042953^2 + 152542^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111020021973 - 2⁵ = 1111020021941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111020021913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555510010986 + 555510010987.

It is an arithmetic number, because the mean of its divisors is an integer number (555510010987).

Almost surely, 2^{1111020021973} is an apocalyptic number.

It is an amenable number.

1111020021973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111020021973 is an equidigital number, since it uses as much as digits as its factorization.

1111020021973 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 1111020021973 in words is "one trillion, one hundred eleven billion, twenty million, twenty-one thousand, nine hundred seventy-three".