21022130000 has 50 divisors (see below), whose sum is σ = 50896703154. Its totient is φ = 8408848000.

The previous prime is 21022129979. The next prime is 21022130009. The reversal of 21022130000 is 3122012.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 4426507024 + 16595622976 = 66532^2 + 128824^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022130009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1041107 + ... + 1061106.

Almost surely, 2^21022130000 is an apocalyptic number.

21022130000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022130000 is an abundant number, since it is smaller than the sum of its proper divisors (29874573154).

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

21022130000 is an equidigital number, since it uses as much as digits as its factorization.

21022130000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102241 (or 2102220 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21022130000 its reverse (3122012), we get a palindrome (21025252012).

The spelling of 21022130000 in words is "twenty-one billion, twenty-two million, one hundred thirty thousand".