111001021097 has 2 divisors, whose sum is σ = 111001021098. Its totient is φ = 111001021096.

The previous prime is 111001021013. The next prime is 111001021099. The reversal of 111001021097 is 790120100111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80000728336 + 31000292761 = 282844^2 + 176069^2 .

It is a cyclic number.

It is not a de Polignac number, because 111001021097 - 2¹⁴ = 111001004713 is a prime.

Together with 111001021099, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111001021099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500510548 + 55500510549.

It is an arithmetic number, because the mean of its divisors is an integer number (55500510549).

Almost surely, 2^111001021097 is an apocalyptic number.

It is an amenable number.

111001021097 is a deficient number, since it is larger than the sum of its proper divisors (1).

111001021097 is an equidigital number, since it uses as much as digits as its factorization.

111001021097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 23.

The spelling of 111001021097 in words is "one hundred eleven billion, one million, twenty-one thousand, ninety-seven".