1222100021222 has 8 divisors (see below), whose sum is σ = 1833162337776. Its totient is φ = 611045908632.

The previous prime is 1222100021183. The next prime is 1222100021237. The reversal of 1222100021222 is 2221200012221.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1222100021222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1663973 + ... + 2283200.

It is an arithmetic number, because the mean of its divisors is an integer number (229145292222).

Almost surely, 2^{1222100021222} is an apocalyptic number.

1222100021222 is a deficient number, since it is larger than the sum of its proper divisors (611062316554).

1222100021222 is a wasteful number, since it uses less digits than its factorization.

1222100021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101982.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1222100021222 its reverse (2221200012221), we get a palindrome (3443300033443).

Subtracting 1222100021222 from its reverse (2221200012221), we obtain a palindrome (999099990999).

The spelling of 1222100021222 in words is "one trillion, two hundred twenty-two billion, one hundred million, twenty-one thousand, two hundred twenty-two".