1211221101122 has 16 divisors (see below), whose sum is σ = 1964633978880. Its totient is φ = 557859029568.

The previous prime is 1211221101091. The next prime is 1211221101137. The reversal of 1211221101122 is 2211011221121.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1211221101122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378978722 + ... + 378981917.

It is an arithmetic number, because the mean of its divisors is an integer number (122789623680).

Almost surely, 2^{1211221101122} is an apocalyptic number.

1211221101122 is a deficient number, since it is larger than the sum of its proper divisors (753412877758).

1211221101122 is a wasteful number, since it uses less digits than its factorization.

1211221101122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757960705.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1211221101122 its reverse (2211011221121), we get a palindrome (3422232322243).

The spelling of 1211221101122 in words is "one trillion, two hundred eleven billion, two hundred twenty-one million, one hundred one thousand, one hundred twenty-two".