21133122222 has 8 divisors (see below), whose sum is σ = 42266244456. Its totient is φ = 7044374072.

The previous prime is 21133122211. The next prime is 21133122301. The reversal of 21133122222 is 22222133112.

It is a sphenic number, since it is the product of 3 distinct primes.

21133122222 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1761093513 + ... + 1761093524.

It is an arithmetic number, because the mean of its divisors is an integer number (5283280557).

Almost surely, 2^21133122222 is an apocalyptic number.

21133122222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21133122222 is a wasteful number, since it uses less digits than its factorization.

21133122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522187042.

The product of its digits is 576, while the sum is 21.

Adding to 21133122222 its reverse (22222133112), we get a palindrome (43355255334).

The spelling of 21133122222 in words is "twenty-one billion, one hundred thirty-three million, one hundred twenty-two thousand, two hundred twenty-two".