111121321273 has 2 divisors, whose sum is σ = 111121321274. Its totient is φ = 111121321272.

The previous prime is 111121321243. The next prime is 111121321301. The reversal of 111121321273 is 372123121111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104789458944 + 6331862329 = 323712^2 + 79573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111121321273 is a prime.

It is not a weakly prime, because it can be changed into another prime (111121321243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560660636 + 55560660637.

It is an arithmetic number, because the mean of its divisors is an integer number (55560660637).

Almost surely, 2^111121321273 is an apocalyptic number.

It is an amenable number.

111121321273 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121321273 is an equidigital number, since it uses as much as digits as its factorization.

111121321273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 25.

Adding to 111121321273 its reverse (372123121111), we get a palindrome (483244442384).

The spelling of 111121321273 in words is "one hundred eleven billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred seventy-three".