221010000012120 has 96 divisors (see below), whose sum is σ = 728785041410160. Its totient is φ = 53578181817600.

The previous prime is 221010000012091. The next prime is 221010000012209. The reversal of 221010000012120 is 21210000010122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 221010000012096 and 221010000012105.

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, 7610522671 + ... + 7610551710.

Almost surely, 2^{221010000012120} is an apocalyptic number.

221010000012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221010000012120 is an abundant number, since it is smaller than the sum of its proper divisors (507775041398040).

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

221010000012120 is a wasteful number, since it uses less digits than its factorization.

221010000012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15221074417 (or 15221074402 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221010000012120 its reverse (21210000010122), we get a palindrome (242220000022242).

The spelling of 221010000012120 in words is "two hundred twenty-one trillion, ten billion, twelve thousand, one hundred twenty".