1222123221102 has 192 divisors, whose sum is σ = 2920472755200. Its totient is φ = 333963829248.

The previous prime is 1222123221091. The next prime is 1222123221203. The reversal of 1222123221102 is 2011223212221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2721877774 + ... + 2721878222.

It is an arithmetic number, because the mean of its divisors is an integer number (15210795600).

Almost surely, 2^{1222123221102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222123221102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1460236377600).

1222123221102 is an abundant number, since it is smaller than the sum of its proper divisors (1698349534098).

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

1222123221102 is a wasteful number, since it uses less digits than its factorization.

1222123221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075 (or 1046 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1222123221102 its reverse (2011223212221), we get a palindrome (3233346433323).

The spelling of 1222123221102 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-three million, two hundred twenty-one thousand, one hundred two".