4312130213221 has 2 divisors, whose sum is σ = 4312130213222. Its totient is φ = 4312130213220.

The previous prime is 4312130213201. The next prime is 4312130213239. The reversal of 4312130213221 is 1223120312134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4213326864321 + 98803348900 = 2052639^2 + 314330^2 .

It is a cyclic number.

It is not a de Polignac number, because 4312130213221 - 2²⁷ = 4311995995493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4312130213201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2156065106610 + 2156065106611.

It is an arithmetic number, because the mean of its divisors is an integer number (2156065106611).

Almost surely, 2^{4312130213221} is an apocalyptic number.

It is an amenable number.

4312130213221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4312130213221 is an equidigital number, since it uses as much as digits as its factorization.

4312130213221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 4312130213221 its reverse (1223120312134), we get a palindrome (5535250525355).

The spelling of 4312130213221 in words is "four trillion, three hundred twelve billion, one hundred thirty million, two hundred thirteen thousand, two hundred twenty-one".