21301031211 has 8 divisors (see below), whose sum is σ = 28418989200. Its totient is φ = 14191880352.

The previous prime is 21301031207. The next prime is 21301031221. The reversal of 21301031211 is 11213010312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21301031211 - 2² = 21301031207 is a prime.

It is a super-2 number, since 2×21301031211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21301031201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2196136 + ... + 2205813.

It is an arithmetic number, because the mean of its divisors is an integer number (3552373650).

Almost surely, 2^21301031211 is an apocalyptic number.

21301031211 is a deficient number, since it is larger than the sum of its proper divisors (7117957989).

21301031211 is a wasteful number, since it uses less digits than its factorization.

21301031211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4403565.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21301031211 its reverse (11213010312), we get a palindrome (32514041523).

It can be divided in two parts, 213010312 and 11, that multiplied together give a palindrome (2343113432).

The spelling of 21301031211 in words is "twenty-one billion, three hundred one million, thirty-one thousand, two hundred eleven".