21321031030 has 32 divisors (see below), whose sum is σ = 41462122464. Its totient is φ = 7847214336.

The previous prime is 21321031019. The next prime is 21321031037. The reversal of 21321031030 is 3013012312.

It is a junction number, because it is equal to n+sod(n) for n = 21321030995 and 21321031013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321031037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221304 + ... + 302683.

It is an arithmetic number, because the mean of its divisors is an integer number (1295691327).

Almost surely, 2^21321031030 is an apocalyptic number.

21321031030 is a deficient number, since it is larger than the sum of its proper divisors (20141091434).

21321031030 is a wasteful number, since it uses less digits than its factorization.

21321031030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524320.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21321031030 its reverse (3013012312), we get a palindrome (24334043342).

The spelling of 21321031030 in words is "twenty-one billion, three hundred twenty-one million, thirty-one thousand, thirty".