12221212102210 has 16 divisors (see below), whose sum is σ = 23155980825600. Its totient is φ = 4631196164976.

The previous prime is 12221212102201. The next prime is 12221212102219. The reversal of 12221212102210 is 1220121212221.

It is an interprime number because it is at equal distance from previous prime (12221212102201) and next prime (12221212102219).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (12221212102219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32161084290 + ... + 32161084669.

It is an arithmetic number, because the mean of its divisors is an integer number (1447248801600).

Almost surely, 2^{12221212102210} is an apocalyptic number.

12221212102210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221212102210 is a deficient number, since it is larger than the sum of its proper divisors (10934768723390).

12221212102210 is a wasteful number, since it uses less digits than its factorization.

12221212102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64322168985.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12221212102210 its reverse (1220121212221), we get a palindrome (13441333314431).

It can be divided in two parts, 1222121 and 2102210, that added together give a triangular number (3324331 = T₂₅₇₈).

The spelling of 12221212102210 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, one hundred two thousand, two hundred ten".