2231211213331 has 16 divisors (see below), whose sum is σ = 2326654108800. Its totient is φ = 2137794299200.

The previous prime is 2231211213193. The next prime is 2231211213359. The reversal of 2231211213331 is 1333121121322.

It is a cyclic number.

It is not a de Polignac number, because 2231211213331 - 2³³ = 2222621278739 is a prime.

It is a super-3 number, since 3×2231211213331³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2231211213296 and 2231211213305.

It is not an unprimeable number, because it can be changed into a prime (2231211213031) 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, 2012376 + ... + 2917546.

It is an arithmetic number, because the mean of its divisors is an integer number (145415881800).

Almost surely, 2^{2231211213331} is an apocalyptic number.

2231211213331 is a deficient number, since it is larger than the sum of its proper divisors (95442895469).

2231211213331 is a wasteful number, since it uses less digits than its factorization.

2231211213331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906290.

The product of its digits is 1296, while the sum is 25.

Adding to 2231211213331 its reverse (1333121121322), we get a palindrome (3564332334653).

The spelling of 2231211213331 in words is "two trillion, two hundred thirty-one billion, two hundred eleven million, two hundred thirteen thousand, three hundred thirty-one".