12211112221210 has 32 divisors (see below), whose sum is σ = 25121707804800. Its totient is φ = 4186382793792.

The previous prime is 12211112221207. The next prime is 12211112221211. The reversal of 12211112221210 is 1212221111221.

It is a happy number.

It is a super-2 number, since 2×12211112221210² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12211112221211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4882285 + ... + 6946864.

It is an arithmetic number, because the mean of its divisors is an integer number (785053368900).

Almost surely, 2^{12211112221210} is an apocalyptic number.

12211112221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12211112221210 is an abundant number, since it is smaller than the sum of its proper divisors (12910595583590).

12211112221210 is a wasteful number, since it uses less digits than its factorization.

12211112221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11843910.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12211112221210 its reverse (1212221111221), we get a palindrome (13423333332431).

The spelling of 12211112221210 in words is "twelve trillion, two hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, two hundred ten".