12221121210210 has 96 divisors (see below), whose sum is σ = 34665296822208. Its totient is φ = 2962546220160.

The previous prime is 12221121210173. The next prime is 12221121210223. The reversal of 12221121210210 is 1201212112221.

12221121210210 is a `hidden beast` number, since 1 + 2 + 221 + 1 + 21 + 210 + 210 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19936644 + ... + 20540496.

It is an arithmetic number, because the mean of its divisors is an integer number (361096841898).

Almost surely, 2^{12221121210210} is an apocalyptic number.

12221121210210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221121210210 is an abundant number, since it is smaller than the sum of its proper divisors (22444175611998).

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

12221121210210 is a wasteful number, since it uses less digits than its factorization.

12221121210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624320 (or 624317 counting only the distinct ones).

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

Adding to 12221121210210 its reverse (1201212112221), we get a palindrome (13422333322431).

The spelling of 12221121210210 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred ten thousand, two hundred ten".