1213221312110 has 64 divisors (see below), whose sum is σ = 2250323921664. Its totient is φ = 470653286400.

The previous prime is 1213221312041. The next prime is 1213221312113. The reversal of 1213221312110 is 112131223121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213221312113) 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 31 ways as a sum of consecutive naturals, for example, 50765324 + ... + 50789216.

It is an arithmetic number, because the mean of its divisors is an integer number (35161311276).

Almost surely, 2^{1213221312110} is an apocalyptic number.

1213221312110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213221312110 is a deficient number, since it is larger than the sum of its proper divisors (1037102609554).

1213221312110 is a wasteful number, since it uses less digits than its factorization.

1213221312110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24669.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1213221312110 its reverse (112131223121), we get a palindrome (1325352535231).

The spelling of 1213221312110 in words is "one trillion, two hundred thirteen billion, two hundred twenty-one million, three hundred twelve thousand, one hundred ten".