21310051030 has 16 divisors (see below), whose sum is σ = 38503944864. Its totient is φ = 8491608640.

The previous prime is 21310051019. The next prime is 21310051033. The reversal of 21310051030 is 3015001312.

It is a junction number, because it is equal to n+sod(n) for n = 21310050995 and 21310051013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310051033) 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 7 ways as a sum of consecutive naturals, for example, 4048711 + ... + 4053970.

It is an arithmetic number, because the mean of its divisors is an integer number (2406496554).

Almost surely, 2^21310051030 is an apocalyptic number.

21310051030 is a deficient number, since it is larger than the sum of its proper divisors (17193893834).

21310051030 is a wasteful number, since it uses less digits than its factorization.

21310051030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8102951.

The product of its (nonzero) digits is 90, while the sum is 16.

Adding to 21310051030 its reverse (3015001312), we get a palindrome (24325052342).

The spelling of 21310051030 in words is "twenty-one billion, three hundred ten million, fifty-one thousand, thirty".