21331222310 has 32 divisors (see below), whose sum is σ = 39847278240. Its totient is φ = 8211909888.

The previous prime is 21331222307. The next prime is 21331222313. The reversal of 21331222310 is 1322213312.

It is an interprime number because it is at equal distance from previous prime (21331222307) and next prime (21331222313).

It is a super-2 number, since 2×21331222310² (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 (21331222313) 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, 26732 + ... + 208271.

It is an arithmetic number, because the mean of its divisors is an integer number (1245227445).

Almost surely, 2^21331222310 is an apocalyptic number.

21331222310 is a deficient number, since it is larger than the sum of its proper divisors (18516055930).

21331222310 is a wasteful number, since it uses less digits than its factorization.

21331222310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235352.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21331222310 its reverse (1322213312), we get a palindrome (22653435622).

The spelling of 21331222310 in words is "twenty-one billion, three hundred thirty-one million, two hundred twenty-two thousand, three hundred ten".