311203130021 has 16 divisors (see below), whose sum is σ = 358304795520. Its totient is φ = 264763399680.

The previous prime is 311203130003. The next prime is 311203130023. The reversal of 311203130021 is 120031302113.

It is a cyclic number.

It is not a de Polignac number, because 311203130021 - 2³⁴ = 294023260837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311203130023) 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 15 ways as a sum of consecutive naturals, for example, 4300781 + ... + 4372541.

It is an arithmetic number, because the mean of its divisors is an integer number (22394049720).

Almost surely, 2^311203130021 is an apocalyptic number.

It is an amenable number.

311203130021 is a deficient number, since it is larger than the sum of its proper divisors (47101665499).

311203130021 is a wasteful number, since it uses less digits than its factorization.

311203130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76364.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 311203130021 its reverse (120031302113), we get a palindrome (431234432134).

The spelling of 311203130021 in words is "three hundred eleven billion, two hundred three million, one hundred thirty thousand, twenty-one".