111220221071 has 2 divisors, whose sum is σ = 111220221072. Its totient is φ = 111220221070.

The previous prime is 111220221019. The next prime is 111220221103. The reversal of 111220221071 is 170122022111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111220221071 is a prime.

It is a super-2 number, since 2×111220221071² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111220221001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610110535 + 55610110536.

It is an arithmetic number, because the mean of its divisors is an integer number (55610110536).

Almost surely, 2^111220221071 is an apocalyptic number.

111220221071 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220221071 is an equidigital number, since it uses as much as digits as its factorization.

111220221071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 111220221071 its reverse (170122022111), we get a palindrome (281342243182).

The spelling of 111220221071 in words is "one hundred eleven billion, two hundred twenty million, two hundred twenty-one thousand, seventy-one".