212221222099 has 4 divisors (see below), whose sum is σ = 213841231560. Its totient is φ = 210601212640.

The previous prime is 212221222093. The next prime is 212221222163. The reversal of 212221222099 is 990222122212.

It is a happy number.

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 212221222099 - 2³ = 212221222091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221222091) 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, 810004534 + ... + 810004795.

It is an arithmetic number, because the mean of its divisors is an integer number (53460307890).

Almost surely, 2^212221222099 is an apocalyptic number.

212221222099 is a deficient number, since it is larger than the sum of its proper divisors (1620009461).

212221222099 is a wasteful number, since it uses less digits than its factorization.

212221222099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620009460.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 212221222099 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, ninety-nine".