213120021271 has 2 divisors, whose sum is σ = 213120021272. Its totient is φ = 213120021270.

The previous prime is 213120021223. The next prime is 213120021287. The reversal of 213120021271 is 172120021312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213120021271 - 2⁷ = 213120021143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213120021071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106560010635 + 106560010636.

It is an arithmetic number, because the mean of its divisors is an integer number (106560010636).

Almost surely, 2^213120021271 is an apocalyptic number.

213120021271 is a deficient number, since it is larger than the sum of its proper divisors (1).

213120021271 is an equidigital number, since it uses as much as digits as its factorization.

213120021271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 213120021271 its reverse (172120021312), we get a palindrome (385240042583).

The spelling of 213120021271 in words is "two hundred thirteen billion, one hundred twenty million, twenty-one thousand, two hundred seventy-one".