222121021999 has 2 divisors, whose sum is σ = 222121022000. Its totient is φ = 222121021998.

The previous prime is 222121021981. The next prime is 222121022017. The reversal of 222121021999 is 999120121222.

It is a balanced prime because it is at equal distance from previous prime (222121021981) and next prime (222121022017).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222121021999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222121021699) 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 as a sum of consecutive naturals, namely, 111060510999 + 111060511000.

It is an arithmetic number, because the mean of its divisors is an integer number (111060511000).

Almost surely, 2^222121021999 is an apocalyptic number.

222121021999 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121021999 is an equidigital number, since it uses as much as digits as its factorization.

222121021999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 222121021999 in words is "two hundred twenty-two billion, one hundred twenty-one million, twenty-one thousand, nine hundred ninety-nine".