1311020003021 has 8 divisors (see below), whose sum is σ = 1314237946560. Its totient is φ = 1307803112928.

The previous prime is 1311020002937. The next prime is 1311020003057. The reversal of 1311020003021 is 1203000201131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311020003021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1311020002987 and 1311020003005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311020003921) 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 7 ways as a sum of consecutive naturals, for example, 2258270 + ... + 2778816.

It is an arithmetic number, because the mean of its divisors is an integer number (164279743320).

Almost surely, 2^{1311020003021} is an apocalyptic number.

It is an amenable number.

1311020003021 is a deficient number, since it is larger than the sum of its proper divisors (3217943539).

1311020003021 is an equidigital number, since it uses as much as digits as its factorization.

1311020003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526723.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 1311020003021 its reverse (1203000201131), we get a palindrome (2514020204152).

The spelling of 1311020003021 in words is "one trillion, three hundred eleven billion, twenty million, three thousand, twenty-one".