221210220112120 has 16 divisors (see below), whose sum is σ = 497722995252360. Its totient is φ = 88484088044832.

The previous prime is 221210220112117. The next prime is 221210220112169. The reversal of 221210220112120 is 21211022012122.

It is a super-2 number, since 2×221210220112120² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2765127751362 + ... + 2765127751441.

Almost surely, 2^{221210220112120} is an apocalyptic number.

221210220112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221210220112120 is an abundant number, since it is smaller than the sum of its proper divisors (276512775140240).

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

221210220112120 is a wasteful number, since it uses less digits than its factorization.

221210220112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530255502814 (or 5530255502810 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221210220112120 its reverse (21211022012122), we get a palindrome (242421242124242).

The spelling of 221210220112120 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty".