21020131310 has 8 divisors (see below), whose sum is σ = 37836236376. Its totient is φ = 8408052520.

The previous prime is 21020131271. The next prime is 21020131331. The reversal of 21020131310 is 1313102012.

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

It is a super-2 number, since 2×21020131310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051006556 + ... + 1051006575.

It is an arithmetic number, because the mean of its divisors is an integer number (4729529547).

Almost surely, 2^21020131310 is an apocalyptic number.

21020131310 is a deficient number, since it is larger than the sum of its proper divisors (16816105066).

21020131310 is a wasteful number, since it uses less digits than its factorization.

21020131310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102013138.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21020131310 its reverse (1313102012), we get a palindrome (22333233322).

The spelling of 21020131310 in words is "twenty-one billion, twenty million, one hundred thirty-one thousand, three hundred ten".