12221021220210 has 96 divisors (see below), whose sum is σ = 34677317892672. Its totient is φ = 2961470298240.

The previous prime is 12221021220167. The next prime is 12221021220253. The reversal of 12221021220210 is 1202212012221.

It is a happy number.

12221021220210 is a `hidden beast` number, since 1 + 2 + 2 + 210 + 21 + 220 + 210 = 666.

It is an interprime number because it is at equal distance from previous prime (12221021220167) and next prime (12221021220253).

It is a super-3 number, since 3×12221021220210³ (a number of 40 digits) contains 333 as substring.

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, 59589 + ... + 4944248.

It is an arithmetic number, because the mean of its divisors is an integer number (361222061382).

Almost surely, 2^{12221021220210} is an apocalyptic number.

12221021220210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221021220210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17338658946336).

12221021220210 is an abundant number, since it is smaller than the sum of its proper divisors (22456296672462).

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

12221021220210 is a wasteful number, since it uses less digits than its factorization.

12221021220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5006328 (or 5006325 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12221021220210 its reverse (1202212012221), we get a palindrome (13423233232431).

The spelling of 12221021220210 in words is "twelve trillion, two hundred twenty-one billion, twenty-one million, two hundred twenty thousand, two hundred ten".