1222221102120 has 192 divisors, whose sum is σ = 4137037856640. Its totient is φ = 312650150400.

The previous prime is 1222221102119. The next prime is 1222221102127. The reversal of 1222221102120 is 212011222221.

It is a happy number.

1222221102120 is a `hidden beast` number, since 1 + 222 + 221 + 10 + 212 + 0 = 666.

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 = 1222221102093 and 1222221102102.

It is not an unprimeable number, because it can be changed into a prime (1222221102127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 299535 + ... + 1591905.

It is an arithmetic number, because the mean of its divisors is an integer number (21547072170).

Almost surely, 2^{1222221102120} is an apocalyptic number.

1222221102120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222221102120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2068518928320).

1222221102120 is an abundant number, since it is smaller than the sum of its proper divisors (2914816754520).

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

1222221102120 is a wasteful number, since it uses less digits than its factorization.

1222221102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292496 (or 1292489 counting only the distinct ones).

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

Adding to 1222221102120 its reverse (212011222221), we get a palindrome (1434232324341).

The spelling of 1222221102120 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred two thousand, one hundred twenty".