22220111989 has 2 divisors, whose sum is σ = 22220111990. Its totient is φ = 22220111988.

The previous prime is 22220111981. The next prime is 22220112007. The reversal of 22220111989 is 98911102222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18112583889 + 4107528100 = 134583^2 + 64090^2 .

It is a cyclic number.

It is not a de Polignac number, because 22220111989 - 2³ = 22220111981 is a prime.

It is a super-2 number, since 2×22220111989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22220111981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110055994 + 11110055995.

It is an arithmetic number, because the mean of its divisors is an integer number (11110055995).

Almost surely, 2^22220111989 is an apocalyptic number.

It is an amenable number.

22220111989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220111989 is an equidigital number, since it uses as much as digits as its factorization.

22220111989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 22220111989 in words is "twenty-two billion, two hundred twenty million, one hundred eleven thousand, nine hundred eighty-nine".