11311002001021 has 16 divisors (see below), whose sum is σ = 11924697415680. Its totient is φ = 10712873798640.

The previous prime is 11311002001003. The next prime is 11311002001087. The reversal of 11311002001021 is 12010020011311.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11311002001021 - 2²¹ = 11310999903869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11311002000992 and 11311002001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311002001121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49656030 + ... + 49883296.

It is an arithmetic number, because the mean of its divisors is an integer number (745293588480).

Almost surely, 2^{11311002001021} is an apocalyptic number.

It is an amenable number.

11311002001021 is a deficient number, since it is larger than the sum of its proper divisors (613695414659).

11311002001021 is a wasteful number, since it uses less digits than its factorization.

11311002001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261504.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11311002001021 its reverse (12010020011311), we get a palindrome (23321022012332).

The spelling of 11311002001021 in words is "eleven trillion, three hundred eleven billion, two million, one thousand, twenty-one".