21013300120231 has 4 divisors (see below), whose sum is σ = 21024776528464. Its totient is φ = 21001823712000.

The previous prime is 21013300120217. The next prime is 21013300120247. The reversal of 21013300120231 is 13202100331012.

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 21013300120231 - 2¹¹ = 21013300118183 is a prime.

It is a super-2 number, since 2×21013300120231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21013300120199 and 21013300120208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013300124231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5738201370 + ... + 5738205031.

It is an arithmetic number, because the mean of its divisors is an integer number (5256194132116).

Almost surely, 2^{21013300120231} is an apocalyptic number.

21013300120231 is a deficient number, since it is larger than the sum of its proper divisors (11476408233).

21013300120231 is a wasteful number, since it uses less digits than its factorization.

21013300120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11476408232.

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

Adding to 21013300120231 its reverse (13202100331012), we get a palindrome (34215400451243).

The spelling of 21013300120231 in words is "twenty-one trillion, thirteen billion, three hundred million, one hundred twenty thousand, two hundred thirty-one".