222121199999999 has 2 divisors, whose sum is σ = 222121200000000. Its totient is φ = 222121199999998.

The previous prime is 222121199999843. The next prime is 222121200000013. The reversal of 222121199999999 is 999999991121222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222121199999999 - 2⁴⁰ = 221021688372223 is a prime.

222121199999999 is a modest number, since divided by 99999999 gives 2221211 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222121199999099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060599999999 + 111060600000000.

It is an arithmetic number, because the mean of its divisors is an integer number (111060600000000).

Almost surely, 2^{222121199999999} is an apocalyptic number.

222121199999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121199999999 is an equidigital number, since it uses as much as digits as its factorization.

222121199999999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 688747536, while the sum is 83.

The spelling of 222121199999999 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".