21304121010 has 64 divisors (see below), whose sum is σ = 52802233344. Its totient is φ = 5495443200.

The previous prime is 21304121009. The next prime is 21304121039. The reversal of 21304121010 is 1012140312.

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 (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3327132 + ... + 3333528.

It is an arithmetic number, because the mean of its divisors is an integer number (825034896).

Almost surely, 2^21304121010 is an apocalyptic number.

21304121010 is an abundant number, since it is smaller than the sum of its proper divisors (31498112334).

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

21304121010 is a wasteful number, since it uses less digits than its factorization.

21304121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10019.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21304121010 its reverse (1012140312), we get a palindrome (22316261322).

The spelling of 21304121010 in words is "twenty-one billion, three hundred four million, one hundred twenty-one thousand, ten".