21230131110211 has 16 divisors (see below), whose sum is σ = 22556565649440. Its totient is φ = 19943359349760.

The previous prime is 21230131110161. The next prime is 21230131110217. The reversal of 21230131110211 is 11201113103212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21230131110211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230131110217) 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, 31774600 + ... + 32435866.

It is an arithmetic number, because the mean of its divisors is an integer number (1409785353090).

Almost surely, 2^{21230131110211} is an apocalyptic number.

21230131110211 is a deficient number, since it is larger than the sum of its proper divisors (1326434539229).

21230131110211 is a wasteful number, since it uses less digits than its factorization.

21230131110211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691254.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21230131110211 its reverse (11201113103212), we get a palindrome (32431244213423).

The spelling of 21230131110211 in words is "twenty-one trillion, two hundred thirty billion, one hundred thirty-one million, one hundred ten thousand, two hundred eleven".