111972739117 has 2 divisors, whose sum is σ = 111972739118. Its totient is φ = 111972739116.

The previous prime is 111972739061. The next prime is 111972739129. The reversal of 111972739117 is 711937279111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84646665481 + 27326073636 = 290941^2 + 165306^2 .

It is a cyclic number.

It is not a de Polignac number, because 111972739117 - 2⁷ = 111972738989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111972739217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55986369558 + 55986369559.

It is an arithmetic number, because the mean of its divisors is an integer number (55986369559).

Almost surely, 2^111972739117 is an apocalyptic number.

It is an amenable number.

111972739117 is a deficient number, since it is larger than the sum of its proper divisors (1).

111972739117 is an equidigital number, since it uses as much as digits as its factorization.

111972739117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 166698, while the sum is 49.

The spelling of 111972739117 in words is "one hundred eleven billion, nine hundred seventy-two million, seven hundred thirty-nine thousand, one hundred seventeen".