1212310113221 has 16 divisors (see below), whose sum is σ = 1253257420800. Its totient is φ = 1171987085808.

The previous prime is 1212310113173. The next prime is 1212310113229. The reversal of 1212310113221 is 1223110132121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212310113221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212310113193 and 1212310113202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212310113229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2023250 + ... + 2553068.

It is an arithmetic number, because the mean of its divisors is an integer number (78328588800).

Almost surely, 2^{1212310113221} is an apocalyptic number.

It is an amenable number.

1212310113221 is a deficient number, since it is larger than the sum of its proper divisors (40947307579).

1212310113221 is a wasteful number, since it uses less digits than its factorization.

1212310113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530408.

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

Adding to 1212310113221 its reverse (1223110132121), we get a palindrome (2435420245342).

The spelling of 1212310113221 in words is "one trillion, two hundred twelve billion, three hundred ten million, one hundred thirteen thousand, two hundred twenty-one".