11112221211989 has 2 divisors, whose sum is σ = 11112221211990. Its totient is φ = 11112221211988.

The previous prime is 11112221211941. The next prime is 11112221212051. The reversal of 11112221211989 is 98911212221111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10928531823889 + 183689388100 = 3305833^2 + 428590^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112221211989 - 2³² = 11107926244693 is a prime.

It is a super-2 number, since 2×11112221211989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112221211389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556110605994 + 5556110605995.

It is an arithmetic number, because the mean of its divisors is an integer number (5556110605995).

Almost surely, 2^{11112221211989} is an apocalyptic number.

It is an amenable number.

11112221211989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112221211989 is an equidigital number, since it uses as much as digits as its factorization.

11112221211989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 41.

The spelling of 11112221211989 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, nine hundred eighty-nine".