21123304410 has 32 divisors (see below), whose sum is σ = 54595618560. Its totient is φ = 5199582528.

The previous prime is 21123304409. The next prime is 21123304421. The reversal of 21123304410 is 1440332112.

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, 27080770 + ... + 27081549.

It is an arithmetic number, because the mean of its divisors is an integer number (1706113080).

Almost surely, 2^21123304410 is an apocalyptic number.

21123304410 is an abundant number, since it is smaller than the sum of its proper divisors (33472314150).

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

21123304410 is a wasteful number, since it uses less digits than its factorization.

21123304410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54162342.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21123304410 its reverse (1440332112), we get a palindrome (22563636522).

The spelling of 21123304410 in words is "twenty-one billion, one hundred twenty-three million, three hundred four thousand, four hundred ten".