1313121223031 has 4 divisors (see below), whose sum is σ = 1317263561592. Its totient is φ = 1308978884472.

The previous prime is 1313121222997. The next prime is 1313121223033. The reversal of 1313121223031 is 1303221213131.

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 1313121223031 - 2⁶ = 1313121222967 is a prime.

It is a super-2 number, since 2×1313121223031² (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 = 1313121222988 and 1313121223006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313121223033) 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 3 ways as a sum of consecutive naturals, for example, 2071168805 + ... + 2071169438.

It is an arithmetic number, because the mean of its divisors is an integer number (329315890398).

Almost surely, 2^{1313121223031} is an apocalyptic number.

1313121223031 is a deficient number, since it is larger than the sum of its proper divisors (4142338561).

1313121223031 is an equidigital number, since it uses as much as digits as its factorization.

1313121223031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4142338560.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1313121223031 its reverse (1303221213131), we get a palindrome (2616342436162).

The spelling of 1313121223031 in words is "one trillion, three hundred thirteen billion, one hundred twenty-one million, two hundred twenty-three thousand, thirty-one".