21231222310 has 16 divisors (see below), whose sum is σ = 40464212256. Its totient is φ = 7992930688.

The previous prime is 21231222301. The next prime is 21231222317. The reversal of 21231222310 is 1322213212.

21231222310 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21231222310² (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 (21231222317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62444602 + ... + 62444941.

It is an arithmetic number, because the mean of its divisors is an integer number (2529013266).

Almost surely, 2^21231222310 is an apocalyptic number.

21231222310 is a deficient number, since it is larger than the sum of its proper divisors (19232989946).

21231222310 is a wasteful number, since it uses less digits than its factorization.

21231222310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124889567.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21231222310 its reverse (1322213212), we get a palindrome (22553435522).

The spelling of 21231222310 in words is "twenty-one billion, two hundred thirty-one million, two hundred twenty-two thousand, three hundred ten".