1311020002987 has 4 divisors (see below), whose sum is σ = 1311050967856. Its totient is φ = 1310989038120.

The previous prime is 1311020002937. The next prime is 1311020003057. The reversal of 1311020002987 is 7892000201131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311020002987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311020002937) 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, 15418839 + ... + 15503632.

It is an arithmetic number, because the mean of its divisors is an integer number (327762741964).

Almost surely, 2^{1311020002987} is an apocalyptic number.

1311020002987 is a deficient number, since it is larger than the sum of its proper divisors (30964869).

1311020002987 is an equidigital number, since it uses as much as digits as its factorization.

1311020002987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30964868.

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 1311020002987 in words is "one trillion, three hundred eleven billion, twenty million, two thousand, nine hundred eighty-seven".