21012110300231 has 4 divisors (see below), whose sum is σ = 21012159315312. Its totient is φ = 21012061285152.

The previous prime is 21012110300227. The next prime is 21012110300317. The reversal of 21012110300231 is 13200301121012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21012110300231 - 2² = 21012110300227 is a prime.

It is a super-2 number, since 2×21012110300231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012110300221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23858786 + ... + 24723791.

It is an arithmetic number, because the mean of its divisors is an integer number (5253039828828).

Almost surely, 2^{21012110300231} is an apocalyptic number.

21012110300231 is a deficient number, since it is larger than the sum of its proper divisors (49015081).

21012110300231 is an equidigital number, since it uses as much as digits as its factorization.

21012110300231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49015080.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21012110300231 its reverse (13200301121012), we get a palindrome (34212411421243).

The spelling of 21012110300231 in words is "twenty-one trillion, twelve billion, one hundred ten million, three hundred thousand, two hundred thirty-one".