1213131023233 has 2 divisors, whose sum is σ = 1213131023234. Its totient is φ = 1213131023232.

The previous prime is 1213131023213. The next prime is 1213131023281. The reversal of 1213131023233 is 3323201313121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1075227972624 + 137903050609 = 1036932^2 + 371353^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213131023233 - 2⁵ = 1213131023201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213131023198 and 1213131023207.

It is not a weakly prime, because it can be changed into another prime (1213131023213) 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 as a sum of consecutive naturals, namely, 606565511616 + 606565511617.

It is an arithmetic number, because the mean of its divisors is an integer number (606565511617).

Almost surely, 2^{1213131023233} is an apocalyptic number.

It is an amenable number.

1213131023233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213131023233 is an equidigital number, since it uses as much as digits as its factorization.

1213131023233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1213131023233 its reverse (3323201313121), we get a palindrome (4536332336354).

The spelling of 1213131023233 in words is "one trillion, two hundred thirteen billion, one hundred thirty-one million, twenty-three thousand, two hundred thirty-three".