12211212210 has 32 divisors (see below), whose sum is σ = 30581124480. Its totient is φ = 3114743808.

The previous prime is 12211212161. The next prime is 12211212257. The reversal of 12211212210 is 1221211221.

It is a super-2 number, since 2×12211212210² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12211212210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8848015 + ... + 8849394.

It is an arithmetic number, because the mean of its divisors is an integer number (955660140).

Almost surely, 2^12211212210 is an apocalyptic number.

12211212210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12211212210 is an abundant number, since it is smaller than the sum of its proper divisors (18369912270).

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

12211212210 is a wasteful number, since it uses less digits than its factorization.

12211212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17697442.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12211212210 its reverse (1221211221), we get a palindrome (13432423431).

The spelling of 12211212210 in words is "twelve billion, two hundred eleven million, two hundred twelve thousand, two hundred ten".