1221100010222 has 16 divisors (see below), whose sum is σ = 1946395571760. Its totient is φ = 572560798848.

The previous prime is 1221100010219. The next prime is 1221100010269. The reversal of 1221100010222 is 2220100011221.

It is a junction number, because it is equal to n+sod(n) for n = 1221100010197 and 1221100010206.

It is a congruent number.

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, 64818572 + ... + 64837407.

It is an arithmetic number, because the mean of its divisors is an integer number (121649723235).

Almost surely, 2^{1221100010222} is an apocalyptic number.

1221100010222 is a deficient number, since it is larger than the sum of its proper divisors (725295561538).

1221100010222 is a wasteful number, since it uses less digits than its factorization.

1221100010222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129656275.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221100010222 its reverse (2220100011221), we get a palindrome (3441200021443).

Subtracting 1221100010222 from its reverse (2220100011221), we obtain a palindrome (999000000999).

The spelling of 1221100010222 in words is "one trillion, two hundred twenty-one billion, one hundred million, ten thousand, two hundred twenty-two".