12102221111220 has 72 divisors (see below), whose sum is σ = 37702234797864. Its totient is φ = 3140035746048.

The previous prime is 12102221111219. The next prime is 12102221111221. The reversal of 12102221111220 is 2211112220121.

12102221111220 is a `hidden beast` number, since 1 + 210 + 2 + 221 + 1 + 11 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (12102221111219) and next prime (12102221111221).

It can be written as a sum of positive squares in 4 ways, for example, as 1591942405284 + 10510278705936 = 1261722^2 + 3241956^2 .

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 = 12102221111193 and 12102221111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102221111221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 908568499 + ... + 908581818.

Almost surely, 2^{12102221111220} is an apocalyptic number.

12102221111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12102221111220 is an abundant number, since it is smaller than the sum of its proper divisors (25600013686644).

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

12102221111220 is a wasteful number, since it uses less digits than its factorization.

12102221111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817150369 (or 1817150364 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12102221111220 its reverse (2211112220121), we get a palindrome (14313333331341).

The spelling of 12102221111220 in words is "twelve trillion, one hundred two billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twenty".