21031022330 has 16 divisors (see below), whose sum is σ = 37890180864. Its totient is φ = 8404777680.

The previous prime is 21031022329. The next prime is 21031022431. The reversal of 21031022330 is 3322013012.

It is a junction number, because it is equal to n+sod(n) for n = 21031022299 and 21031022308.

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, 942326 + ... + 964385.

It is an arithmetic number, because the mean of its divisors is an integer number (2368136304).

Almost surely, 2^21031022330 is an apocalyptic number.

21031022330 is a deficient number, since it is larger than the sum of its proper divisors (16859158534).

21031022330 is a wasteful number, since it uses less digits than its factorization.

21031022330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907821.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21031022330 its reverse (3322013012), we get a palindrome (24353035342).

The spelling of 21031022330 in words is "twenty-one billion, thirty-one million, twenty-two thousand, three hundred thirty".