12212122210 has 16 divisors (see below), whose sum is σ = 23274868536. Its totient is φ = 4597504768.

The previous prime is 12212122157. The next prime is 12212122211. The reversal of 12212122210 is 1222121221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12199865209 + 12257001 = 110453^2 + 3501^2 .

It is not an unprimeable number, because it can be changed into a prime (12212122211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35917837 + ... + 35918176.

Almost surely, 2^12212122210 is an apocalyptic number.

12212122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12212122210 is a deficient number, since it is larger than the sum of its proper divisors (11062746326).

12212122210 is a wasteful number, since it uses less digits than its factorization.

12212122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71836037.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12212122210 its reverse (1222121221), we get a palindrome (13434243431).

The spelling of 12212122210 in words is "twelve billion, two hundred twelve million, one hundred twenty-two thousand, two hundred ten".