21311023130 has 8 divisors (see below), whose sum is σ = 38359841652. Its totient is φ = 8524409248.

The previous prime is 21311023109. The next prime is 21311023147. The reversal of 21311023130 is 3132011312.

It can be written as a sum of positive squares in 2 ways, for example, as 17633449681 + 3677573449 = 132791^2 + 60643^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21311023099 and 21311023108.

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, 1065551147 + ... + 1065551166.

Almost surely, 2^21311023130 is an apocalyptic number.

21311023130 is a deficient number, since it is larger than the sum of its proper divisors (17048818522).

21311023130 is a wasteful number, since it uses less digits than its factorization.

21311023130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131102320.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21311023130 its reverse (3132011312), we get a palindrome (24443034442).

The spelling of 21311023130 in words is "twenty-one billion, three hundred eleven million, twenty-three thousand, one hundred thirty".