21013105330 has 32 divisors (see below), whose sum is σ = 43835800320. Its totient is φ = 7103019840.

The previous prime is 21013105297. The next prime is 21013105363. The reversal of 21013105330 is 3350131012.

It is an interprime number because it is at equal distance from previous prime (21013105297) and next prime (21013105363).

It is a junction number, because it is equal to n+sod(n) for n = 21013105298 and 21013105307.

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 15 ways as a sum of consecutive naturals, for example, 2109025 + ... + 2118964.

It is an arithmetic number, because the mean of its divisors is an integer number (1369868760).

Almost surely, 2^21013105330 is an apocalyptic number.

21013105330 is an abundant number, since it is smaller than the sum of its proper divisors (22822694990).

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

21013105330 is a wasteful number, since it uses less digits than its factorization.

21013105330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228074.

The product of its (nonzero) digits is 270, while the sum is 19.

Adding to 21013105330 its reverse (3350131012), we get a palindrome (24363236342).

The spelling of 21013105330 in words is "twenty-one billion, thirteen million, one hundred five thousand, three hundred thirty".