111122000021 has 2 divisors, whose sum is σ = 111122000022. Its totient is φ = 111122000020.

The previous prime is 111122000009. The next prime is 111122000027. The reversal of 111122000021 is 120000221111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94439436100 + 16682563921 = 307310^2 + 129161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111122000021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111121999966 and 111122000011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111122000027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561000010 + 55561000011.

It is an arithmetic number, because the mean of its divisors is an integer number (55561000011).

Almost surely, 2^111122000021 is an apocalyptic number.

It is an amenable number.

111122000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111122000021 is an equidigital number, since it uses as much as digits as its factorization.

111122000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111122000021 its reverse (120000221111), we get a palindrome (231122221132).

The spelling of 111122000021 in words is "one hundred eleven billion, one hundred twenty-two million, twenty-one", and thus it is an aban number.