221222101112212 has 6 divisors (see below), whose sum is σ = 387138676946378. Its totient is φ = 110611050556104.

The previous prime is 221222101112197. The next prime is 221222101112227. The reversal of 221222101112212 is 212211101222122.

It is an interprime number because it is at equal distance from previous prime (221222101112197) and next prime (221222101112227).

It can be written as a sum of positive squares in only one way, i.e., 132574867261456 + 88647233850756 = 11514116^2 + 9415266^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27652762639023 + ... + 27652762639030.

Almost surely, 2^{221222101112212} is an apocalyptic number.

It is an amenable number.

221222101112212 is a deficient number, since it is larger than the sum of its proper divisors (165916575834166).

221222101112212 is a wasteful number, since it uses less digits than its factorization.

221222101112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55305525278057 (or 55305525278055 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 221222101112212 its reverse (212211101222122), we get a palindrome (433433202334334).

The spelling of 221222101112212 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred one million, one hundred twelve thousand, two hundred twelve".