1220201022222 has 864 divisors, whose sum is σ = 3667827290400. Its totient is φ = 289944023040.

The previous prime is 1220201022203. The next prime is 1220201022233. The reversal of 1220201022222 is 2222201020221.

1220201022222 is a `hidden beast` number, since 1 + 220 + 201 + 0 + 22 + 222 = 666.

It is a super-2 number, since 2×1220201022222² (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 = 1220201022195 and 1220201022204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 20681373229 + ... + 20681373287.

It is an arithmetic number, because the mean of its divisors is an integer number (4245170475).

Almost surely, 2^{1220201022222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220201022222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1833913645200).

1220201022222 is an abundant number, since it is smaller than the sum of its proper divisors (2447626268178).

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

1220201022222 is a wasteful number, since it uses less digits than its factorization.

1220201022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1220201022222 its reverse (2222201020221), we get a palindrome (3442402042443).

The spelling of 1220201022222 in words is "one trillion, two hundred twenty billion, two hundred one million, twenty-two thousand, two hundred twenty-two".