2221122012120 has 96 divisors (see below), whose sum is σ = 7874887147920. Its totient is φ = 538453820160.

The previous prime is 2221122012113. The next prime is 2221122012143. The reversal of 2221122012120 is 212102211222.

It is a happy number.

2221122012120 is a `hidden beast` number, since 22 + 211 + 220 + 1 + 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 = 2221122012093 and 2221122012102.

It is a congruent number.

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, 280440739 + ... + 280448658.

Almost surely, 2^{2221122012120} is an apocalyptic number.

2221122012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221122012120 is an abundant number, since it is smaller than the sum of its proper divisors (5653765135800).

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

2221122012120 is a wasteful number, since it uses less digits than its factorization.

2221122012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560889425 (or 560889418 counting only the distinct ones).

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

Adding to 2221122012120 its reverse (212102211222), we get a palindrome (2433224223342).

The spelling of 2221122012120 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-two million, twelve thousand, one hundred twenty".