21331213310 has 64 divisors (see below), whose sum is σ = 42561033984. Its totient is φ = 7632691200.

The previous prime is 21331213297. The next prime is 21331213313. The reversal of 21331213310 is 1331213312.

It is a super-2 number, since 2×21331213310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331213313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2341865 + ... + 2350955.

It is an arithmetic number, because the mean of its divisors is an integer number (665016156).

Almost surely, 2^21331213310 is an apocalyptic number.

21331213310 is a deficient number, since it is larger than the sum of its proper divisors (21229820674).

21331213310 is a wasteful number, since it uses less digits than its factorization.

21331213310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9449.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21331213310 its reverse (1331213312), we get a palindrome (22662426622).

It can be divided in two parts, 213312 and 13310, that added together give a palindrome (226622).

The spelling of 21331213310 in words is "twenty-one billion, three hundred thirty-one million, two hundred thirteen thousand, three hundred ten".