111100021221097 has 2 divisors, whose sum is σ = 111100021221098. Its totient is φ = 111100021221096.

The previous prime is 111100021221089. The next prime is 111100021221113. The reversal of 111100021221097 is 790122120001111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65811374481241 + 45288646739856 = 8112421^2 + 6729684^2 .

It is an emirp because it is prime and its reverse (790122120001111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111100021221097 - 2³ = 111100021221089 is a prime.

It is not a weakly prime, because it can be changed into another prime (111100021221067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550010610548 + 55550010610549.

It is an arithmetic number, because the mean of its divisors is an integer number (55550010610549).

Almost surely, 2^{111100021221097} is an apocalyptic number.

It is an amenable number.

111100021221097 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100021221097 is an equidigital number, since it uses as much as digits as its factorization.

111100021221097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 28.

The spelling of 111100021221097 in words is "one hundred eleven trillion, one hundred billion, twenty-one million, two hundred twenty-one thousand, ninety-seven".