222121219999 has 4 divisors (see below), whose sum is σ = 253852822864. Its totient is φ = 190389617136.

The previous prime is 222121219967. The next prime is 222121220003. The reversal of 222121219999 is 999912121222.

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

It is a cyclic number.

It is not a de Polignac number, because 222121219999 - 2⁵ = 222121219967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121219909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15865801422 + ... + 15865801435.

It is an arithmetic number, because the mean of its divisors is an integer number (63463205716).

Almost surely, 2^222121219999 is an apocalyptic number.

222121219999 is a deficient number, since it is larger than the sum of its proper divisors (31731602865).

222121219999 is an equidigital number, since it uses as much as digits as its factorization.

222121219999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31731602864.

The product of its digits is 209952, while the sum is 49.

The spelling of 222121219999 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred nineteen thousand, nine hundred ninety-nine".