222121112210 has 8 divisors (see below), whose sum is σ = 399818001996. Its totient is φ = 88848444880.

The previous prime is 222121112201. The next prime is 222121112231. The reversal of 222121112210 is 12211121222.

It can be written as a sum of positive squares in 2 ways, for example, as 221585791441 + 535320769 = 470729^2 + 23137^2 .

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

It is a super-2 number, since 2×222121112210² (a number of 23 digits) contains 22 as substring.

It is a Curzon 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, 11106055601 + ... + 11106055620.

Almost surely, 2^222121112210 is an apocalyptic number.

222121112210 is a deficient number, since it is larger than the sum of its proper divisors (177696889786).

222121112210 is a wasteful number, since it uses less digits than its factorization.

222121112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22212111228.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 222121112210 its reverse (12211121222), we get a palindrome (234332233432).

The spelling of 222121112210 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred ten".