111211111120973 has 2 divisors, whose sum is σ = 111211111120974. Its totient is φ = 111211111120972.

The previous prime is 111211111120961. The next prime is 111211111120979. The reversal of 111211111120973 is 379021111112111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103025687124649 + 8185423996324 = 10150157^2 + 2861018^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211111120973 - 2⁸ = 111211111120717 is a prime.

It is a super-2 number, since 2×111211111120973² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111211111120979) 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, 55605555560486 + 55605555560487.

It is an arithmetic number, because the mean of its divisors is an integer number (55605555560487).

Almost surely, 2^{111211111120973} is an apocalyptic number.

It is an amenable number.

111211111120973 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211111120973 is an equidigital number, since it uses as much as digits as its factorization.

111211111120973 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 32.

The spelling of 111211111120973 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred eleven million, one hundred twenty thousand, nine hundred seventy-three".