2231211212213 has 4 divisors (see below), whose sum is σ = 2231255106048. Its totient is φ = 2231167318380.

The previous prime is 2231211212177. The next prime is 2231211212233. The reversal of 2231211212213 is 3122121121322.

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 a cyclic number.

It is not a de Polignac number, because 2231211212213 - 2³⁰ = 2230137470389 is a prime.

It is a super-3 number, since 3×2231211212213³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231211212233) 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, 21870581 + ... + 21972362.

It is an arithmetic number, because the mean of its divisors is an integer number (557813776512).

Almost surely, 2^{2231211212213} is an apocalyptic number.

It is an amenable number.

2231211212213 is a deficient number, since it is larger than the sum of its proper divisors (43893835).

2231211212213 is an equidigital number, since it uses as much as digits as its factorization.

2231211212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43893834.

The product of its digits is 576, while the sum is 23.

Adding to 2231211212213 its reverse (3122121121322), we get a palindrome (5353332333535).

The spelling of 2231211212213 in words is "two trillion, two hundred thirty-one billion, two hundred eleven million, two hundred twelve thousand, two hundred thirteen".