21210301120211 has 16 divisors (see below), whose sum is σ = 24468970800384. Its totient is φ = 18008817015264.

The previous prime is 21210301120201. The next prime is 21210301120223. The reversal of 21210301120211 is 11202110301212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21210301120211 - 2³⁸ = 20935423213267 is a prime.

It is a super-2 number, since 2×21210301120211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21210301120211.

It is not an unprimeable number, because it can be changed into a prime (21210301120201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7649336 + ... + 10046538.

It is an arithmetic number, because the mean of its divisors is an integer number (1529310675024).

Almost surely, 2^{21210301120211} is an apocalyptic number.

21210301120211 is a deficient number, since it is larger than the sum of its proper divisors (3258669680173).

21210301120211 is a wasteful number, since it uses less digits than its factorization.

21210301120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409130.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21210301120211 its reverse (11202110301212), we get a palindrome (32412411421423).

The spelling of 21210301120211 in words is "twenty-one trillion, two hundred ten billion, three hundred one million, one hundred twenty thousand, two hundred eleven".