1111221201222 has 224 divisors, whose sum is σ = 2757356743680. Its totient is φ = 332920186560.

The previous prime is 1111221201203. The next prime is 1111221201247. The reversal of 1111221201222 is 2221021221111.

1111221201222 is a `hidden beast` number, since 11 + 11 + 221 + 201 + 222 = 666.

It is a super-2 number, since 2×1111221201222² (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 = 1111221201195 and 1111221201204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 561505429 + ... + 561507407.

It is an arithmetic number, because the mean of its divisors is an integer number (12309628320).

Almost surely, 2^{1111221201222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111221201222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1378678371840).

1111221201222 is an abundant number, since it is smaller than the sum of its proper divisors (1646135542458).

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

1111221201222 is a wasteful number, since it uses less digits than its factorization.

1111221201222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390 (or 2375 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1111221201222 its reverse (2221021221111), we get a palindrome (3332242422333).

The spelling of 1111221201222 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty-two".