2231211032221 has 2 divisors, whose sum is σ = 2231211032222. Its totient is φ = 2231211032220.

The previous prime is 2231211032189. The next prime is 2231211032261. The reversal of 2231211032221 is 1222301121322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2135064526596 + 96146505625 = 1461186^2 + 310075^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231211032221 - 2⁵ = 2231211032189 is a prime.

It is a super-3 number, since 3×2231211032221³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2231211032192 and 2231211032201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231211032261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115605516110 + 1115605516111.

It is an arithmetic number, because the mean of its divisors is an integer number (1115605516111).

Almost surely, 2^{2231211032221} is an apocalyptic number.

It is an amenable number.

2231211032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231211032221 is an equidigital number, since it uses as much as digits as its factorization.

2231211032221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2231211032221 its reverse (1222301121322), we get a palindrome (3453512153543).

The spelling of 2231211032221 in words is "two trillion, two hundred thirty-one billion, two hundred eleven million, thirty-two thousand, two hundred twenty-one".