21403102231 has 8 divisors (see below), whose sum is σ = 24563036160. Its totient is φ = 18268755288.

The previous prime is 21403102219. The next prime is 21403102241. The reversal of 21403102231 is 13220130412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21403102231 - 2¹⁷ = 21402971159 is a prime.

It is a super-2 number, since 2×21403102231² (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 = 21403102199 and 21403102208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403102211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6394951 + ... + 6398296.

It is an arithmetic number, because the mean of its divisors is an integer number (3070379520).

Almost surely, 2^21403102231 is an apocalyptic number.

21403102231 is a deficient number, since it is larger than the sum of its proper divisors (3159933929).

21403102231 is a wasteful number, since it uses less digits than its factorization.

21403102231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12793493.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21403102231 its reverse (13220130412), we get a palindrome (34623232643).

The spelling of 21403102231 in words is "twenty-one billion, four hundred three million, one hundred two thousand, two hundred thirty-one".