21312312301 has 12 divisors (see below), whose sum is σ = 25090575552. Its totient is φ = 18047600088.

The previous prime is 21312312299. The next prime is 21312312313. The reversal of 21312312301 is 10321321312.

It is not a de Polignac number, because 21312312301 - 2¹ = 21312312299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312312001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2616085 + ... + 2624218.

It is an arithmetic number, because the mean of its divisors is an integer number (2090881296).

Almost surely, 2^21312312301 is an apocalyptic number.

It is an amenable number.

21312312301 is a deficient number, since it is larger than the sum of its proper divisors (3778263251).

21312312301 is an equidigital number, since it uses as much as digits as its factorization.

21312312301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5240400 (or 5240393 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21312312301 its reverse (10321321312), we get a palindrome (31633633613).

The spelling of 21312312301 in words is "twenty-one billion, three hundred twelve million, three hundred twelve thousand, three hundred one".