221312130211 has 2 divisors, whose sum is σ = 221312130212. Its totient is φ = 221312130210.

The previous prime is 221312130209. The next prime is 221312130223. The reversal of 221312130211 is 112031213122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221312130211 - 2¹ = 221312130209 is a prime.

Together with 221312130209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221312110211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110656065105 + 110656065106.

It is an arithmetic number, because the mean of its divisors is an integer number (110656065106).

Almost surely, 2^221312130211 is an apocalyptic number.

221312130211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221312130211 is an equidigital number, since it uses as much as digits as its factorization.

221312130211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221312130211 its reverse (112031213122), we get a palindrome (333343343333).

The spelling of 221312130211 in words is "two hundred twenty-one billion, three hundred twelve million, one hundred thirty thousand, two hundred eleven".