1213321313133 has 24 divisors (see below), whose sum is σ = 1936349108928. Its totient is φ = 728199660672.

The previous prime is 1213321313131. The next prime is 1213321313153. The reversal of 1213321313133 is 3313131233121.

1213321313133 is a `hidden beast` number, since 1 + 2 + 1 + 332 + 1 + 313 + 13 + 3 = 666.

It is not a de Polignac number, because 1213321313133 - 2¹ = 1213321313131 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1213321313097 and 1213321313106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213321313131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172392235 + ... + 172399272.

It is an arithmetic number, because the mean of its divisors is an integer number (80681212872).

Almost surely, 2^{1213321313133} is an apocalyptic number.

It is an amenable number.

1213321313133 is a deficient number, since it is larger than the sum of its proper divisors (723027795795).

1213321313133 is a wasteful number, since it uses less digits than its factorization.

1213321313133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344791553 (or 344791550 counting only the distinct ones).

The product of its digits is 2916, while the sum is 27.

Adding to 1213321313133 its reverse (3313131233121), we get a palindrome (4526452546254).

The spelling of 1213321313133 in words is "one trillion, two hundred thirteen billion, three hundred twenty-one million, three hundred thirteen thousand, one hundred thirty-three".