311213002133 has 4 divisors (see below), whose sum is σ = 339505093248. Its totient is φ = 282920911020.

The previous prime is 311213002123. The next prime is 311213002141. The reversal of 311213002133 is 331200312113.

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 311213002133 - 2¹⁰ = 311213001109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311213002123) 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, 14146045541 + ... + 14146045562.

It is an arithmetic number, because the mean of its divisors is an integer number (84876273312).

Almost surely, 2^311213002133 is an apocalyptic number.

It is an amenable number.

311213002133 is a deficient number, since it is larger than the sum of its proper divisors (28292091115).

311213002133 is a wasteful number, since it uses less digits than its factorization.

311213002133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28292091114.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 311213002133 its reverse (331200312113), we get a palindrome (642413314246).

The spelling of 311213002133 in words is "three hundred eleven billion, two hundred thirteen million, two thousand, one hundred thirty-three".