222131221012 has 6 divisors (see below), whose sum is σ = 388729636778. Its totient is φ = 111065610504.

The previous prime is 222131221009. The next prime is 222131221031. The reversal of 222131221012 is 210122131222.

It can be written as a sum of positive squares in only one way, i.e., 197077396356 + 25053824656 = 443934^2 + 158284^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27766402623 + ... + 27766402630.

Almost surely, 2^222131221012 is an apocalyptic number.

It is an amenable number.

222131221012 is a deficient number, since it is larger than the sum of its proper divisors (166598415766).

222131221012 is a wasteful number, since it uses less digits than its factorization.

222131221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55532805257 (or 55532805255 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 222131221012 its reverse (210122131222), we get a palindrome (432253352234).

It can be divided in two parts, 22213 and 1221012, that added together give a square (1243225 = 1115²).

The spelling of 222131221012 in words is "two hundred twenty-two billion, one hundred thirty-one million, two hundred twenty-one thousand, twelve".