21230083031 has 4 divisors (see below), whose sum is σ = 21239185272. Its totient is φ = 21220980792.

The previous prime is 21230083019. The next prime is 21230083087. The reversal of 21230083031 is 13038003212.

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 21230083031 - 2¹⁰ = 21230082007 is a prime.

It is a super-2 number, since 2×21230083031² (a number of 21 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 = 21230082988 and 21230083006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230080031) 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, 4547621 + ... + 4552286.

It is an arithmetic number, because the mean of its divisors is an integer number (5309796318).

Almost surely, 2^21230083031 is an apocalyptic number.

21230083031 is a deficient number, since it is larger than the sum of its proper divisors (9102241).

21230083031 is an equidigital number, since it uses as much as digits as its factorization.

21230083031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9102240.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21230083031 its reverse (13038003212), we get a palindrome (34268086243).

The spelling of 21230083031 in words is "twenty-one billion, two hundred thirty million, eighty-three thousand, thirty-one".