122221112011 has 2 divisors, whose sum is σ = 122221112012. Its totient is φ = 122221112010.

The previous prime is 122221111997. The next prime is 122221112017. The reversal of 122221112011 is 110211122221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122221112011 is a prime.

It is not a weakly prime, because it can be changed into another prime (122221112017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110556005 + 61110556006.

It is an arithmetic number, because the mean of its divisors is an integer number (61110556006).

Almost surely, 2^122221112011 is an apocalyptic number.

122221112011 is a deficient number, since it is larger than the sum of its proper divisors (1).

122221112011 is an equidigital number, since it uses as much as digits as its factorization.

122221112011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 122221112011 its reverse (110211122221), we get a palindrome (232432234232).

The spelling of 122221112011 in words is "one hundred twenty-two billion, two hundred twenty-one million, one hundred twelve thousand, eleven".