21301101231 has 8 divisors (see below), whose sum is σ = 28403093424. Its totient is φ = 14199921600.

The previous prime is 21301101181. The next prime is 21301101233. The reversal of 21301101231 is 13210110312.

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 21301101231 - 2¹⁵ = 21301068463 is a prime.

It is a super-2 number, since 2×21301101231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21301101231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301101233) 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, 139086 + ... + 248891.

It is an arithmetic number, because the mean of its divisors is an integer number (3550386678).

Almost surely, 2^21301101231 is an apocalyptic number.

21301101231 is a deficient number, since it is larger than the sum of its proper divisors (7101992193).

21301101231 is a wasteful number, since it uses less digits than its factorization.

21301101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406281.

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

Adding to 21301101231 its reverse (13210110312), we get a palindrome (34511211543).

The spelling of 21301101231 in words is "twenty-one billion, three hundred one million, one hundred one thousand, two hundred thirty-one".