21022130012 has 96 divisors (see below), whose sum is σ = 41385556800. Its totient is φ = 9280161792.

The previous prime is 21022130009. The next prime is 21022130071. The reversal of 21022130012 is 21003122012.

It is a happy number.

It is a super-2 number, since 2×21022130012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 50171939 + ... + 50172357.

It is an arithmetic number, because the mean of its divisors is an integer number (431099550).

Almost surely, 2^21022130012 is an apocalyptic number.

It is an amenable number.

21022130012 is a deficient number, since it is larger than the sum of its proper divisors (20363426788).

21022130012 is a wasteful number, since it uses less digits than its factorization.

21022130012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21022130012 its reverse (21003122012), we get a palindrome (42025252024).

The spelling of 21022130012 in words is "twenty-one billion, twenty-two million, one hundred thirty thousand, twelve".