1331300121321 has 4 divisors (see below), whose sum is σ = 1775066828432. Its totient is φ = 887533414212.

The previous prime is 1331300121317. The next prime is 1331300121407. The reversal of 1331300121321 is 1231210031331.

It is a happy number.

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 not a de Polignac number, because 1331300121321 - 2² = 1331300121317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331300121311) 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, 221883353551 + ... + 221883353556.

It is an arithmetic number, because the mean of its divisors is an integer number (443766707108).

Almost surely, 2^{1331300121321} is an apocalyptic number.

It is an amenable number.

1331300121321 is a deficient number, since it is larger than the sum of its proper divisors (443766707111).

1331300121321 is an equidigital number, since it uses as much as digits as its factorization.

1331300121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443766707110.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1331300121321 its reverse (1231210031331), we get a palindrome (2562510152652).

The spelling of 1331300121321 in words is "one trillion, three hundred thirty-one billion, three hundred million, one hundred twenty-one thousand, three hundred twenty-one".