222123231989 has 4 divisors (see below), whose sum is σ = 222319976460. Its totient is φ = 221926487520.

The previous prime is 222123231983. The next prime is 222123231991. The reversal of 222123231989 is 989132321222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92137745764 + 129985486225 = 303542^2 + 360535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222123231989 is a prime.

It is a super-2 number, since 2×222123231989² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222123231983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98370542 + ... + 98372799.

It is an arithmetic number, because the mean of its divisors is an integer number (55579994115).

Almost surely, 2^222123231989 is an apocalyptic number.

It is an amenable number.

222123231989 is a deficient number, since it is larger than the sum of its proper divisors (196744471).

222123231989 is a wasteful number, since it uses less digits than its factorization.

222123231989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196744470.

The product of its digits is 186624, while the sum is 44.

The spelling of 222123231989 in words is "two hundred twenty-two billion, one hundred twenty-three million, two hundred thirty-one thousand, nine hundred eighty-nine".