21101022130 has 8 divisors (see below), whose sum is σ = 37981839852. Its totient is φ = 8440408848.

The previous prime is 21101022077. The next prime is 21101022161. The reversal of 21101022130 is 3122010112.

It can be written as a sum of positive squares in 2 ways, for example, as 20347025449 + 753996681 = 142643^2 + 27459^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21101022130.

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 3 ways as a sum of consecutive naturals, for example, 1055051097 + ... + 1055051116.

Almost surely, 2^21101022130 is an apocalyptic number.

21101022130 is a deficient number, since it is larger than the sum of its proper divisors (16880817722).

21101022130 is a wasteful number, since it uses less digits than its factorization.

21101022130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110102220.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21101022130 its reverse (3122010112), we get a palindrome (24223032242).

The spelling of 21101022130 in words is "twenty-one billion, one hundred one million, twenty-two thousand, one hundred thirty".