21069103104 has 459 divisors, whose sum is σ = 73522573527. Its totient is φ = 6019743744.

The previous prime is 21069103087. The next prime is 21069103129. The reversal of 21069103104 is 40130196012.

The square root of 21069103104 is 145152.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3009871869 + ... + 3009871875.

Almost surely, 2^21069103104 is an apocalyptic number.

21069103104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

21069103104 is the 145152-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21069103104

21069103104 is an abundant number, since it is smaller than the sum of its proper divisors (52453470423).

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

21069103104 is an frugal number, since it uses more digits than its factorization.

21069103104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 12 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

Multiplying 21069103104 by its product of nonzero digits (1296), we get a square (27305557622784 = 5225472²).

21069103104 divided by its product of nonzero digits (1296) gives a square (16257024 = 4032²).

Adding to 21069103104 its reverse (40130196012), we get a palindrome (61199299116).

The spelling of 21069103104 in words is "twenty-one billion, sixty-nine million, one hundred three thousand, one hundred four".