2221202112120 has 192 divisors, whose sum is σ = 7541777224800. Its totient is φ = 566233113600.

The previous prime is 2221202112109. The next prime is 2221202112121. The reversal of 2221202112120 is 212112021222.

It is a happy number.

2221202112120 is a `hidden beast` number, since 2 + 221 + 20 + 211 + 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 = 2221202112093 and 2221202112102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221202112121) 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, 1179 + ... + 2107701.

Almost surely, 2^{2221202112120} is an apocalyptic number.

2221202112120 is a gapful number since it is divisible by the number (20) 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 2221202112120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3770888612400).

2221202112120 is an abundant number, since it is smaller than the sum of its proper divisors (5320575112680).

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

2221202112120 is a wasteful number, since it uses less digits than its factorization.

2221202112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106670 (or 2106663 counting only the distinct ones).

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

Adding to 2221202112120 its reverse (212112021222), we get a palindrome (2433314133342).

The spelling of 2221202112120 in words is "two trillion, two hundred twenty-one billion, two hundred two million, one hundred twelve thousand, one hundred twenty".