1222212221999 has 2 divisors, whose sum is σ = 1222212222000. Its totient is φ = 1222212221998.

The previous prime is 1222212221983. The next prime is 1222212222029. The reversal of 1222212221999 is 9991222122221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222212221999 - 2⁴ = 1222212221983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222212221099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611106110999 + 611106111000.

It is an arithmetic number, because the mean of its divisors is an integer number (611106111000).

Almost surely, 2^{1222212221999} is an apocalyptic number.

1222212221999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222212221999 is an equidigital number, since it uses as much as digits as its factorization.

1222212221999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The spelling of 1222212221999 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, two hundred twenty-one thousand, nine hundred ninety-nine".