21231012310 has 8 divisors (see below), whose sum is σ = 38215822176. Its totient is φ = 8492404920.

The previous prime is 21231012301. The next prime is 21231012323. The reversal of 21231012310 is 1321013212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21231012310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061550606 + ... + 1061550625.

It is an arithmetic number, because the mean of its divisors is an integer number (4776977772).

Almost surely, 2^21231012310 is an apocalyptic number.

21231012310 is a deficient number, since it is larger than the sum of its proper divisors (16984809866).

21231012310 is a wasteful number, since it uses less digits than its factorization.

21231012310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123101238.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21231012310 its reverse (1321013212), we get a palindrome (22552025522).

The spelling of 21231012310 in words is "twenty-one billion, two hundred thirty-one million, twelve thousand, three hundred ten".