12221121012210 has 48 divisors (see below), whose sum is σ = 34663543237440. Its totient is φ = 2962696002720.

The previous prime is 12221121012193. The next prime is 12221121012211. The reversal of 12221121012210 is 1221012112221.

12221121012210 is a `hidden beast` number, since 1 + 22 + 211 + 210 + 1 + 221 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12221121012211) 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, 6172282350 + ... + 6172284329.

It is an arithmetic number, because the mean of its divisors is an integer number (722157150780).

Almost surely, 2^{12221121012210} is an apocalyptic number.

12221121012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221121012210 is an abundant number, since it is smaller than the sum of its proper divisors (22442422225230).

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

12221121012210 is a wasteful number, since it uses less digits than its factorization.

12221121012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12344566703 (or 12344566700 counting only the distinct ones).

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

Adding to 12221121012210 its reverse (1221012112221), we get a palindrome (13442133124431).

It can be divided in two parts, 1222112 and 1012210, that added together give a palindrome (2234322).

The spelling of 12221121012210 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, twelve thousand, two hundred ten".