21331210030 has 64 divisors (see below), whose sum is σ = 42507940608. Its totient is φ = 7655938560.

The previous prime is 21331209989. The next prime is 21331210057. The reversal of 21331210030 is 3001213312.

It is a junction number, because it is equal to n+sod(n) for n = 21331209986 and 21331210013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8950219 + ... + 8952601.

It is an arithmetic number, because the mean of its divisors is an integer number (664186572).

Almost surely, 2^21331210030 is an apocalyptic number.

21331210030 is a deficient number, since it is larger than the sum of its proper divisors (21176730578).

21331210030 is a wasteful number, since it uses less digits than its factorization.

21331210030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301.

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

Adding to 21331210030 its reverse (3001213312), we get a palindrome (24332423342).

It can be divided in two parts, 21331 and 210030, that added together give a square (231361 = 481²).

The spelling of 21331210030 in words is "twenty-one billion, three hundred thirty-one million, two hundred ten thousand, thirty".