1213133331023 has 4 divisors (see below), whose sum is σ = 1213135996128. Its totient is φ = 1213130665920.

The previous prime is 1213133331013. The next prime is 1213133331037. The reversal of 1213133331023 is 3201333313121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1213133331023 - 2¹⁴ = 1213133314639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213133330983 and 1213133331001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213133331013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458786 + ... + 1623807.

It is an arithmetic number, because the mean of its divisors is an integer number (303283999032).

Almost surely, 2^{1213133331023} is an apocalyptic number.

1213133331023 is a deficient number, since it is larger than the sum of its proper divisors (2665105).

1213133331023 is an equidigital number, since it uses as much as digits as its factorization.

1213133331023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665104.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 1213133331023 its reverse (3201333313121), we get a palindrome (4414466644144).

The spelling of 1213133331023 in words is "one trillion, two hundred thirteen billion, one hundred thirty-three million, three hundred thirty-one thousand, twenty-three".