21311020010 has 32 divisors (see below), whose sum is σ = 43845121152. Its totient is φ = 7305750720.

The previous prime is 21311019997. The next prime is 21311020039. The reversal of 21311020010 is 1002011312.

It is a junction number, because it is equal to n+sod(n) for n = 21311019973 and 21311020000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862184 + ... + 886556.

It is an arithmetic number, because the mean of its divisors is an integer number (1370160036).

Almost surely, 2^21311020010 is an apocalyptic number.

21311020010 is an abundant number, since it is smaller than the sum of its proper divisors (22534101142).

21311020010 is a wasteful number, since it uses less digits than its factorization.

21311020010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36878.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21311020010 its reverse (1002011312), we get a palindrome (22313031322).

The spelling of 21311020010 in words is "twenty-one billion, three hundred eleven million, twenty thousand, ten".