12221121110010 has 32 divisors (see below), whose sum is σ = 29366329472640. Its totient is φ = 3255005761728.

The previous prime is 12221121109993. The next prime is 12221121110039. The reversal of 12221121110010 is 1001112112221.

It is a happy number.

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

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, 247466625 + ... + 247516004.

It is an arithmetic number, because the mean of its divisors is an integer number (917697796020).

Almost surely, 2^{12221121110010} is an apocalyptic number.

12221121110010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221121110010 is an abundant number, since it is smaller than the sum of its proper divisors (17145208362630).

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

12221121110010 is a wasteful number, since it uses less digits than its factorization.

12221121110010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494983462.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12221121110010 its reverse (1001112112221), we get a palindrome (13222233222231).

The spelling of 12221121110010 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred ten thousand, ten".