1312120223331 has 4 divisors (see below), whose sum is σ = 1749493631112. Its totient is φ = 874746815552.

The previous prime is 1312120223263. The next prime is 1312120223369. The reversal of 1312120223331 is 1333220212131.

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 1312120223331 - 2¹¹ = 1312120221283 is a prime.

It is a super-2 number, since 2×1312120223331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1312120223431) 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 in 3 ways as a sum of consecutive naturals, for example, 218686703886 + ... + 218686703891.

It is an arithmetic number, because the mean of its divisors is an integer number (437373407778).

Almost surely, 2^{1312120223331} is an apocalyptic number.

1312120223331 is a deficient number, since it is larger than the sum of its proper divisors (437373407781).

1312120223331 is an equidigital number, since it uses as much as digits as its factorization.

1312120223331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437373407780.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1312120223331 its reverse (1333220212131), we get a palindrome (2645340435462).

The spelling of 1312120223331 in words is "one trillion, three hundred twelve billion, one hundred twenty million, two hundred twenty-three thousand, three hundred thirty-one".