21112222202222 has 8 divisors (see below), whose sum is σ = 31668407525496. Its totient is φ = 10556086360392.

The previous prime is 21112222202213. The next prime is 21112222202329. The reversal of 21112222202222 is 22220222221112.

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

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, 11284628 + ... + 13021799.

It is an arithmetic number, because the mean of its divisors is an integer number (3958550940687).

Almost surely, 2^{21112222202222} is an apocalyptic number.

21112222202222 is a deficient number, since it is larger than the sum of its proper divisors (10556185323274).

21112222202222 is a wasteful number, since it uses less digits than its factorization.

21112222202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24740722.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21112222202222 its reverse (22220222221112), we get a palindrome (43332444423334).

The spelling of 21112222202222 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, two hundred two thousand, two hundred twenty-two".