1221101100122 has 16 divisors (see below), whose sum is σ = 1839299464800. Its totient is φ = 608002206000.

The previous prime is 1221101100113. The next prime is 1221101100151. The reversal of 1221101100122 is 2210011011221.

It is a junction number, because it is equal to n+sod(n) for n = 1221101100097 and 1221101100106.

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 in 7 ways as a sum of consecutive naturals, for example, 2436029 + ... + 2894207.

It is an arithmetic number, because the mean of its divisors is an integer number (114956216550).

Almost surely, 2^{1221101100122} is an apocalyptic number.

1221101100122 is a deficient number, since it is larger than the sum of its proper divisors (618198364678).

1221101100122 is a wasteful number, since it uses less digits than its factorization.

1221101100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463741.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221101100122 its reverse (2210011011221), we get a palindrome (3431112111343).

The spelling of 1221101100122 in words is "one trillion, two hundred twenty-one billion, one hundred one million, one hundred thousand, one hundred twenty-two".