21232023130 has 48 divisors (see below), whose sum is σ = 39302920440. Its totient is φ = 8257593344.

The previous prime is 21232023107. The next prime is 21232023149. The reversal of 21232023130 is 3132023212.

It can be written as a sum of positive squares in 12 ways, for example, as 3338412841 + 17893610289 = 57779^2 + 133767^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21232023098 and 21232023107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3170826 + ... + 3177514.

Almost surely, 2^21232023130 is an apocalyptic number.

21232023130 is a deficient number, since it is larger than the sum of its proper divisors (18070897310).

21232023130 is a wasteful number, since it uses less digits than its factorization.

21232023130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6915 (or 6862 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21232023130 its reverse (3132023212), we get a palindrome (24364046342).

The spelling of 21232023130 in words is "twenty-one billion, two hundred thirty-two million, twenty-three thousand, one hundred thirty".