21203130310 has 16 divisors (see below), whose sum is σ = 38812510800. Its totient is φ = 8337501856.

The previous prime is 21203130301. The next prime is 21203130391. The reversal of 21203130310 is 1303130212.

It is a super-2 number, since 2×21203130310² (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 7 ways as a sum of consecutive naturals, for example, 17968165 + ... + 17969344.

It is an arithmetic number, because the mean of its divisors is an integer number (2425781925).

Almost surely, 2^21203130310 is an apocalyptic number.

21203130310 is a deficient number, since it is larger than the sum of its proper divisors (17609380490).

21203130310 is a wasteful number, since it uses less digits than its factorization.

21203130310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35937575.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21203130310 its reverse (1303130212), we get a palindrome (22506260522).

The spelling of 21203130310 in words is "twenty-one billion, two hundred three million, one hundred thirty thousand, three hundred ten".