1221132212113 has 24 divisors (see below), whose sum is σ = 1413062053760. Its totient is φ = 1051557487200.

The previous prime is 1221132212071. The next prime is 1221132212123. The reversal of 1221132212113 is 3112122311221.

It is a happy number.

It is not a de Polignac number, because 1221132212113 - 2³³ = 1212542277521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221132212123) 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 23 ways as a sum of consecutive naturals, for example, 20525656 + ... + 20585062.

Almost surely, 2^{1221132212113} is an apocalyptic number.

It is an amenable number.

1221132212113 is a deficient number, since it is larger than the sum of its proper divisors (191929841647).

1221132212113 is a wasteful number, since it uses less digits than its factorization.

1221132212113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68389 (or 68378 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

Adding to 1221132212113 its reverse (3112122311221), we get a palindrome (4333254523334).

The spelling of 1221132212113 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-two million, two hundred twelve thousand, one hundred thirteen".