21010311330 has 64 divisors (see below), whose sum is σ = 50909534208. Its totient is φ = 5549143040.

The previous prime is 21010311317. The next prime is 21010311353. The reversal of 21010311330 is 3311301012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1327222 + ... + 1342958.

It is an arithmetic number, because the mean of its divisors is an integer number (795461472).

Almost surely, 2^21010311330 is an apocalyptic number.

21010311330 is an abundant number, since it is smaller than the sum of its proper divisors (29899222878).

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

21010311330 is a wasteful number, since it uses less digits than its factorization.

21010311330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16171.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21010311330 its reverse (3311301012), we get a palindrome (24321612342).

The spelling of 21010311330 in words is "twenty-one billion, ten million, three hundred eleven thousand, three hundred thirty".