2221201122120 has 96 divisors (see below), whose sum is σ = 7414009195320. Its totient is φ = 576311639040.

The previous prime is 2221201122097. The next prime is 2221201122139. The reversal of 2221201122120 is 212211021222.

It is a happy number.

2221201122120 is a `hidden beast` number, since 2 + 221 + 201 + 1 + 221 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1883377459044 + 337823663076 = 1372362^2 + 581226^2 .

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 = 2221201122093 and 2221201122102.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83365101 + ... + 83391740.

Almost surely, 2^{2221201122120} is an apocalyptic number.

2221201122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221201122120 is an abundant number, since it is smaller than the sum of its proper divisors (5192808073200).

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

2221201122120 is a wasteful number, since it uses less digits than its factorization.

2221201122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166756895 (or 166756888 counting only the distinct ones).

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

Adding to 2221201122120 its reverse (212211021222), we get a palindrome (2433412143342).

The spelling of 2221201122120 in words is "two trillion, two hundred twenty-one billion, two hundred one million, one hundred twenty-two thousand, one hundred twenty".