12211220202210 has 96 divisors (see below), whose sum is σ = 31837678432560. Its totient is φ = 3247249734144.

The previous prime is 12211220202199. The next prime is 12211220202229. The reversal of 12211220202210 is 1220202211221.

It is a happy number.

12211220202210 is a `hidden beast` number, since 1 + 2 + 211 + 220 + 20 + 2 + 210 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2677631504409 + 9533588697801 = 1636347^2 + 3087651^2 .

It is a super-2 number, since 2×12211220202210² (a number of 27 digits) contains 22 as substring.

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

It is a Curzon number.

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, 539425012 + ... + 539447648.

Almost surely, 2^{12211220202210} is an apocalyptic number.

12211220202210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12211220202210 is an abundant number, since it is smaller than the sum of its proper divisors (19626458230350).

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

12211220202210 is a wasteful number, since it uses less digits than its factorization.

12211220202210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39092 (or 39089 counting only the distinct ones).

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

Adding to 12211220202210 its reverse (1220202211221), we get a palindrome (13431422413431).

The spelling of 12211220202210 in words is "twelve trillion, two hundred eleven billion, two hundred twenty million, two hundred two thousand, two hundred ten".