12121220111210 has 16 divisors (see below), whose sum is σ = 24935081371776. Its totient is φ = 4155846895248.

The previous prime is 12121220111153. The next prime is 12121220111251. The reversal of 12121220111210 is 1211102212121.

It is an unprimeable number.

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, 86580143582 + ... + 86580143721.

It is an arithmetic number, because the mean of its divisors is an integer number (1558442585736).

Almost surely, 2^{12121220111210} is an apocalyptic number.

12121220111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121220111210 is an abundant number, since it is smaller than the sum of its proper divisors (12813861260566).

12121220111210 is a wasteful number, since it uses less digits than its factorization.

12121220111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173160287317.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12121220111210 its reverse (1211102212121), we get a palindrome (13332322323331).

The spelling of 12121220111210 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, two hundred ten".