21131003330 has 16 divisors (see below), whose sum is σ = 40037690880. Its totient is φ = 8007538032.

The previous prime is 21131003329. The next prime is 21131003359. The reversal of 21131003330 is 3330013112.

It is a junction number, because it is equal to n+sod(n) for n = 21131003299 and 21131003308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55607714 + ... + 55608093.

It is an arithmetic number, because the mean of its divisors is an integer number (2502355680).

Almost surely, 2^21131003330 is an apocalyptic number.

21131003330 is a deficient number, since it is larger than the sum of its proper divisors (18906687550).

21131003330 is a wasteful number, since it uses less digits than its factorization.

21131003330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111215833.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21131003330 its reverse (3330013112), we get a palindrome (24461016442).

The spelling of 21131003330 in words is "twenty-one billion, one hundred thirty-one million, three thousand, three hundred thirty".