21313030020231 has 4 divisors (see below), whose sum is σ = 28417373360312. Its totient is φ = 14208686680152.

The previous prime is 21313030020211. The next prime is 21313030020259. The reversal of 21313030020231 is 13202003031312.

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

It is not a de Polignac number, because 21313030020231 - 2¹⁷ = 21313029889159 is a prime.

It is a super-2 number, since 2×21313030020231² (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 = 21313030020198 and 21313030020207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313030020211) 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, 3552171670036 + ... + 3552171670041.

It is an arithmetic number, because the mean of its divisors is an integer number (7104343340078).

Almost surely, 2^{21313030020231} is an apocalyptic number.

21313030020231 is a deficient number, since it is larger than the sum of its proper divisors (7104343340081).

21313030020231 is an equidigital number, since it uses as much as digits as its factorization.

21313030020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7104343340080.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21313030020231 its reverse (13202003031312), we get a palindrome (34515033051543).

The spelling of 21313030020231 in words is "twenty-one trillion, three hundred thirteen billion, thirty million, twenty thousand, two hundred thirty-one".