21243001130 has 32 divisors (see below), whose sum is σ = 41188770000. Its totient is φ = 7841659392.

The previous prime is 21243001103. The next prime is 21243001133. The reversal of 21243001130 is 3110034212.

It can be written as a sum of positive squares in 8 ways, for example, as 14823306001 + 6419695129 = 121751^2 + 80123^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21243001099 and 21243001108.

It is not an unprimeable number, because it can be changed into a prime (21243001133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586796 + ... + 621944.

Almost surely, 2^21243001130 is an apocalyptic number.

21243001130 is a deficient number, since it is larger than the sum of its proper divisors (19945768870).

21243001130 is a wasteful number, since it uses less digits than its factorization.

21243001130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39818.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21243001130 its reverse (3110034212), we get a palindrome (24353035342).

The spelling of 21243001130 in words is "twenty-one billion, two hundred forty-three million, one thousand, one hundred thirty".