222121221220112 has 10 divisors (see below), whose sum is σ = 430359866113998. Its totient is φ = 111060610610048.

The previous prime is 222121221220103. The next prime is 222121221220153. The reversal of 222121221220112 is 211022122121222.

It can be written as a sum of positive squares in only one way, i.e., 134690044204816 + 87431177015296 = 11605604^2 + 9350464^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6941288163113 + ... + 6941288163144.

Almost surely, 2^{222121221220112} is an apocalyptic number.

It is an amenable number.

222121221220112 is a deficient number, since it is larger than the sum of its proper divisors (208238644893886).

222121221220112 is a wasteful number, since it uses less digits than its factorization.

222121221220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13882576326265 (or 13882576326259 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222121221220112 its reverse (211022122121222), we get a palindrome (433143343341334).

The spelling of 222121221220112 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twelve".