21126041104 has 135 divisors (see below), whose sum is σ = 49589955597. Its totient is φ = 8692973184.

The previous prime is 21126041099. The next prime is 21126041113. The reversal of 21126041104 is 40114062112.

The square root of 21126041104 is 145348.

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

It can be written as a sum of positive squares in only one way, i.e., 11077983504 + 10048057600 = 105252^2 + 100240^2 .

It is a super-2 number, since 2×21126041104² (a number of 21 digits) contains 22 as substring.

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 26 ways as a sum of consecutive naturals, for example, 118022487 + ... + 118022665.

Almost surely, 2^21126041104 is an apocalyptic number.

21126041104 is the 145348-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21126041104

21126041104 is an abundant number, since it is smaller than the sum of its proper divisors (28463914493).

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

21126041104 is an equidigital number, since it uses as much as digits as its factorization.

21126041104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The spelling of 21126041104 in words is "twenty-one billion, one hundred twenty-six million, forty-one thousand, one hundred four".