1221101122222 has 8 divisors (see below), whose sum is σ = 1833662280672. Its totient is φ = 609880362000.

The previous prime is 1221101122193. The next prime is 1221101122237. The reversal of 1221101122222 is 2222211011221.

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 1221101122222.

It is a congruent 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, 335097279 + ... + 335100922.

It is an arithmetic number, because the mean of its divisors is an integer number (229207785084).

Almost surely, 2^{1221101122222} is an apocalyptic number.

1221101122222 is a deficient number, since it is larger than the sum of its proper divisors (612561158450).

1221101122222 is an equidigital number, since it uses as much as digits as its factorization.

1221101122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670199114.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1221101122222 its reverse (2222211011221), we get a palindrome (3443312133443).

The spelling of 1221101122222 in words is "one trillion, two hundred twenty-one billion, one hundred one million, one hundred twenty-two thousand, two hundred twenty-two".