111012021097 has 2 divisors, whose sum is σ = 111012021098. Its totient is φ = 111012021096.

The previous prime is 111012021019. The next prime is 111012021143. The reversal of 111012021097 is 790120210111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102285472041 + 8726549056 = 319821^2 + 93416^2 .

It is an emirp because it is prime and its reverse (790120210111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111012021097 is a prime.

It is not a weakly prime, because it can be changed into another prime (111012028097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55506010548 + 55506010549.

It is an arithmetic number, because the mean of its divisors is an integer number (55506010549).

Almost surely, 2^111012021097 is an apocalyptic number.

It is an amenable number.

111012021097 is a deficient number, since it is larger than the sum of its proper divisors (1).

111012021097 is an equidigital number, since it uses as much as digits as its factorization.

111012021097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 25.

The spelling of 111012021097 in words is "one hundred eleven billion, twelve million, twenty-one thousand, ninety-seven".