21201120271 has 2 divisors, whose sum is σ = 21201120272. Its totient is φ = 21201120270.

The previous prime is 21201120247. The next prime is 21201120299. The reversal of 21201120271 is 17202110212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21201120271 - 2²³ = 21192731663 is a prime.

It is a super-2 number, since 2×21201120271² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201120221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600560135 + 10600560136.

It is an arithmetic number, because the mean of its divisors is an integer number (10600560136).

Almost surely, 2^21201120271 is an apocalyptic number.

21201120271 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201120271 is an equidigital number, since it uses as much as digits as its factorization.

21201120271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 21201120271 its reverse (17202110212), we get a palindrome (38403230483).

The spelling of 21201120271 in words is "twenty-one billion, two hundred one million, one hundred twenty thousand, two hundred seventy-one".