12212011122210 has 160 divisors (see below), whose sum is σ = 33970692382704. Its totient is φ = 3145651200000.

The previous prime is 12212011122197. The next prime is 12212011122239. The reversal of 12212011122210 is 1222111021221.

12212011122210 is a `hidden beast` number, since 1 + 221 + 201 + 11 + 22 + 210 = 666.

12212011122210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 3790587045249 + 8421424076961 = 1946943^2 + 2901969^2 .

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 79 ways as a sum of consecutive naturals, for example, 1533810 + ... + 5174610.

Almost surely, 2^{12212011122210} is an apocalyptic number.

12212011122210 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 12212011122210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16985346191352).

12212011122210 is an abundant number, since it is smaller than the sum of its proper divisors (21758681260494).

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

12212011122210 is a wasteful number, since it uses less digits than its factorization.

12212011122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640962 (or 3640953 counting only the distinct ones).

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

Adding to 12212011122210 its reverse (1222111021221), we get a palindrome (13434122143431).

The spelling of 12212011122210 in words is "twelve trillion, two hundred twelve billion, eleven million, one hundred twenty-two thousand, two hundred ten".