111102121321 has 2 divisors, whose sum is σ = 111102121322. Its totient is φ = 111102121320.

The previous prime is 111102121297. The next prime is 111102121327. The reversal of 111102121321 is 123121201111.

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., 71714162025 + 39387959296 = 267795^2 + 198464^2 .

It is a cyclic number.

It is not a de Polignac number, because 111102121321 - 2²⁷ = 110967903593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111102121295 and 111102121304.

It is not a weakly prime, because it can be changed into another prime (111102121327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55551060660 + 55551060661.

It is an arithmetic number, because the mean of its divisors is an integer number (55551060661).

Almost surely, 2^111102121321 is an apocalyptic number.

It is an amenable number.

111102121321 is a deficient number, since it is larger than the sum of its proper divisors (1).

111102121321 is an equidigital number, since it uses as much as digits as its factorization.

111102121321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111102121321 its reverse (123121201111), we get a palindrome (234223322432).

The spelling of 111102121321 in words is "one hundred eleven billion, one hundred two million, one hundred twenty-one thousand, three hundred twenty-one".