1221120102222 has 48 divisors (see below), whose sum is σ = 2734574923392. Its totient is φ = 393516377280.

The previous prime is 1221120102221. The next prime is 1221120102229. The reversal of 1221120102222 is 2222010211221.

It is a happy number.

1221120102222 is a `hidden beast` number, since 1 + 221 + 120 + 102 + 222 = 666.

It is a super-2 number, since 2×1221120102222² (a number of 25 digits) contains 22 as substring.

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 = 1221120102195 and 1221120102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221120102221) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5734654 + ... + 5943777.

It is an arithmetic number, because the mean of its divisors is an integer number (56970310904).

Almost surely, 2^{1221120102222} is an apocalyptic number.

1221120102222 is an abundant number, since it is smaller than the sum of its proper divisors (1513454821170).

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

1221120102222 is a wasteful number, since it uses less digits than its factorization.

1221120102222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11678633 (or 11678630 counting only the distinct ones).

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

Adding to 1221120102222 its reverse (2222010211221), we get a palindrome (3443130313443).

The spelling of 1221120102222 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred two thousand, two hundred twenty-two".