21311311010 has 128 divisors (see below), whose sum is σ = 45273489408. Its totient is φ = 7136640000.

The previous prime is 21311311001. The next prime is 21311311013. The reversal of 21311311010 is 1011311312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21311311013) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20047739 + ... + 20048801.

It is an arithmetic number, because the mean of its divisors is an integer number (353699136).

Almost surely, 2^21311311010 is an apocalyptic number.

21311311010 is an abundant number, since it is smaller than the sum of its proper divisors (23962178398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311311010 is a wasteful number, since it uses less digits than its factorization.

21311311010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

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

Adding to 21311311010 its reverse (1011311312), we get a palindrome (22322622322).

The spelling of 21311311010 in words is "twenty-one billion, three hundred eleven million, three hundred eleven thousand, ten".