12102212221220 has 72 divisors (see below), whose sum is σ = 28836239034624. Its totient is φ = 4258842984000.

The previous prime is 12102212221217. The next prime is 12102212221339. The reversal of 12102212221220 is 2212221220121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12102212221192 and 12102212221201.

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, 80584886 + ... + 80734925.

Almost surely, 2^{12102212221220} is an apocalyptic number.

12102212221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12102212221220 is an abundant number, since it is smaller than the sum of its proper divisors (16734026813404).

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

12102212221220 is a wasteful number, since it uses less digits than its factorization.

12102212221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161319873 (or 161319860 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12102212221220 its reverse (2212221220121), we get a palindrome (14314433441341).

The spelling of 12102212221220 in words is "twelve trillion, one hundred two billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty".