1213121133323 has 16 divisors (see below), whose sum is σ = 1381931712000. Its totient is φ = 1054133604480.

The previous prime is 1213121133317. The next prime is 1213121133337. The reversal of 1213121133323 is 3233311213121.

It is not a de Polignac number, because 1213121133323 - 2⁴ = 1213121133307 is a prime.

It is a super-2 number, since 2×1213121133323² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213121133292 and 1213121133301.

It is not an unprimeable number, because it can be changed into a prime (1213121133313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1359758 + ... + 2067651.

It is an arithmetic number, because the mean of its divisors is an integer number (86370732000).

Almost surely, 2^{1213121133323} is an apocalyptic number.

1213121133323 is a deficient number, since it is larger than the sum of its proper divisors (168810578677).

1213121133323 is a wasteful number, since it uses less digits than its factorization.

1213121133323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428842.

The product of its digits is 1944, while the sum is 26.

Adding to 1213121133323 its reverse (3233311213121), we get a palindrome (4446432346444).

The spelling of 1213121133323 in words is "one trillion, two hundred thirteen billion, one hundred twenty-one million, one hundred thirty-three thousand, three hundred twenty-three".