21113131010 has 8 divisors (see below), whose sum is σ = 38003635836. Its totient is φ = 8445252400.

The previous prime is 21113130959. The next prime is 21113131019. The reversal of 21113131010 is 1013131112.

It is a happy number.

21113131010 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 19015582609 + 2097548401 = 137897^2 + 45799^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21113131019) 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, 1055656541 + ... + 1055656560.

Almost surely, 2^21113131010 is an apocalyptic number.

21113131010 is a deficient number, since it is larger than the sum of its proper divisors (16890504826).

21113131010 is a wasteful number, since it uses less digits than its factorization.

21113131010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111313108.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 21113131010 its reverse (1013131112), we get a palindrome (22126262122).

The spelling of 21113131010 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-one thousand, ten".