111021808973 has 2 divisors, whose sum is σ = 111021808974. Its totient is φ = 111021808972.

The previous prime is 111021808969. The next prime is 111021808981. The reversal of 111021808973 is 379808120111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107313242569 + 3708566404 = 327587^2 + 60898^2 .

It is a cyclic number.

It is not a de Polignac number, because 111021808973 - 2² = 111021808969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111021808973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111021808913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510904486 + 55510904487.

It is an arithmetic number, because the mean of its divisors is an integer number (55510904487).

Almost surely, 2^111021808973 is an apocalyptic number.

It is an amenable number.

111021808973 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021808973 is an equidigital number, since it uses as much as digits as its factorization.

111021808973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 41.

The spelling of 111021808973 in words is "one hundred eleven billion, twenty-one million, eight hundred eight thousand, nine hundred seventy-three".