21120201211 has 2 divisors, whose sum is σ = 21120201212. Its totient is φ = 21120201210.

The previous prime is 21120201187. The next prime is 21120201247. The reversal of 21120201211 is 11210202112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21120201211 - 2²⁷ = 20985983483 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21120201191 and 21120201200.

It is not a weakly prime, because it can be changed into another prime (21120201611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560100605 + 10560100606.

It is an arithmetic number, because the mean of its divisors is an integer number (10560100606).

Almost surely, 2^21120201211 is an apocalyptic number.

21120201211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120201211 is an equidigital number, since it uses as much as digits as its factorization.

21120201211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21120201211 its reverse (11210202112), we get a palindrome (32330403323).

Subtracting from 21120201211 its reverse (11210202112), we obtain a palindrome (9909999099).

The spelling of 21120201211 in words is "twenty-one billion, one hundred twenty million, two hundred one thousand, two hundred eleven".