1221101222022 has 64 divisors (see below), whose sum is σ = 2981853216000. Its totient is φ = 367329695040.

The previous prime is 1221101222021. The next prime is 1221101222023. The reversal of 1221101222022 is 2202221011221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1221101222021) and next prime (1221101222023).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1221101221986 and 1221101222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221101222021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7421272 + ... + 7584027.

It is an arithmetic number, because the mean of its divisors is an integer number (46591456500).

Almost surely, 2^{1221101222022} is an apocalyptic number.

1221101222022 is an abundant number, since it is smaller than the sum of its proper divisors (1760751993978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221101222022 is a wasteful number, since it uses less digits than its factorization.

1221101222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15005458 (or 15005452 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1221101222022 its reverse (2202221011221), we get a palindrome (3423322233243).

The spelling of 1221101222022 in words is "one trillion, two hundred twenty-one billion, one hundred one million, two hundred twenty-two thousand, twenty-two".