12221222010 has 16 divisors (see below), whose sum is σ = 29330932896. Its totient is φ = 3258992528.

The previous prime is 12221221981. The next prime is 12221222011. The reversal of 12221222010 is 1022212221.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12221222011) 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, 203687004 + ... + 203687063.

It is an arithmetic number, because the mean of its divisors is an integer number (1833183306).

Almost surely, 2^12221222010 is an apocalyptic number.

12221222010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221222010 is an abundant number, since it is smaller than the sum of its proper divisors (17109710886).

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

12221222010 is a wasteful number, since it uses less digits than its factorization.

12221222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407374077.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12221222010 its reverse (1022212221), we get a palindrome (13243434231).

The spelling of 12221222010 in words is "twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, ten".