111102021109 has 2 divisors, whose sum is σ = 111102021110. Its totient is φ = 111102021108.

The previous prime is 111102021103. The next prime is 111102021127. The reversal of 111102021109 is 901120201111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64856808900 + 46245212209 = 254670^2 + 215047^2 .

It is a cyclic number.

It is not a de Polignac number, because 111102021109 - 2³³ = 102512086517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111102021103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55551010554 + 55551010555.

It is an arithmetic number, because the mean of its divisors is an integer number (55551010555).

Almost surely, 2^111102021109 is an apocalyptic number.

It is an amenable number.

111102021109 is a deficient number, since it is larger than the sum of its proper divisors (1).

111102021109 is an equidigital number, since it uses as much as digits as its factorization.

111102021109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 111102021109 in words is "one hundred eleven billion, one hundred two million, twenty-one thousand, one hundred nine".