1320121131013 has 4 divisors (see below), whose sum is σ = 1389601190560. Its totient is φ = 1250641071468.

The previous prime is 1320121130989. The next prime is 1320121131023. The reversal of 1320121131013 is 3101311210231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1320121131013 - 2²⁹ = 1319584260101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 69480059527 = 1320121131013 / (1 + 3 + 2 + 0 + 1 + 2 + 1 + 1 + 3 + 1 + 0 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320121131023) 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, 34740029745 + ... + 34740029782.

It is an arithmetic number, because the mean of its divisors is an integer number (347400297640).

Almost surely, 2^{1320121131013} is an apocalyptic number.

It is an amenable number.

1320121131013 is a deficient number, since it is larger than the sum of its proper divisors (69480059547).

1320121131013 is an equidigital number, since it uses as much as digits as its factorization.

1320121131013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69480059546.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1320121131013 its reverse (3101311210231), we get a palindrome (4421432341244).

The spelling of 1320121131013 in words is "one trillion, three hundred twenty billion, one hundred twenty-one million, one hundred thirty-one thousand, thirteen".