21221130310 has 8 divisors (see below), whose sum is σ = 38198034576. Its totient is φ = 8488452120.

The previous prime is 21221130253. The next prime is 21221130313. The reversal of 21221130310 is 1303112212.

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

It is a super-3 number, since 3×21221130310³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221130313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061056506 + ... + 1061056525.

It is an arithmetic number, because the mean of its divisors is an integer number (4774754322).

Almost surely, 2^21221130310 is an apocalyptic number.

21221130310 is a deficient number, since it is larger than the sum of its proper divisors (16976904266).

21221130310 is a wasteful number, since it uses less digits than its factorization.

21221130310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122113038.

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

Adding to 21221130310 its reverse (1303112212), we get a palindrome (22524242522).

The spelling of 21221130310 in words is "twenty-one billion, two hundred twenty-one million, one hundred thirty thousand, three hundred ten".