21122323130 has 32 divisors (see below), whose sum is σ = 39581825040. Its totient is φ = 8105610240.

The previous prime is 21122323109. The next prime is 21122323193. The reversal of 21122323130 is 3132322112.

It can be written as a sum of positive squares in 8 ways, for example, as 14083280929 + 7039042201 = 118673^2 + 83899^2 .

It is a super-3 number, since 3×21122323130³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186431 + ... + 277490.

Almost surely, 2^21122323130 is an apocalyptic number.

21122323130 is a deficient number, since it is larger than the sum of its proper divisors (18459501910).

21122323130 is a wasteful number, since it uses less digits than its factorization.

21122323130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464114.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21122323130 its reverse (3132322112), we get a palindrome (24254645242).

The spelling of 21122323130 in words is "twenty-one billion, one hundred twenty-two million, three hundred twenty-three thousand, one hundred thirty".