111102021389 has 2 divisors, whose sum is σ = 111102021390. Its totient is φ = 111102021388.

The previous prime is 111102021383. The next prime is 111102021403. The reversal of 111102021389 is 983120201111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102726660100 + 8375361289 = 320510^2 + 91517^2 .

It is an emirp because it is prime and its reverse (983120201111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111102021389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111102021383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55551010694 + 55551010695.

It is an arithmetic number, because the mean of its divisors is an integer number (55551010695).

Almost surely, 2^111102021389 is an apocalyptic number.

It is an amenable number.

111102021389 is a deficient number, since it is larger than the sum of its proper divisors (1).

111102021389 is an equidigital number, since it uses as much as digits as its factorization.

111102021389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 111102021389 in words is "one hundred eleven billion, one hundred two million, twenty-one thousand, three hundred eighty-nine".