21210313330 has 32 divisors (see below), whose sum is σ = 40473866160. Its totient is φ = 7975280640.

The previous prime is 21210313321. The next prime is 21210313331. The reversal of 21210313330 is 3331301212.

It can be written as a sum of positive squares in 8 ways, for example, as 13262055921 + 7948257409 = 115161^2 + 89153^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21210313298 and 21210313307.

It is not an unprimeable number, because it can be changed into a prime (21210313331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63586 + ... + 215554.

Almost surely, 2^21210313330 is an apocalyptic number.

21210313330 is a deficient number, since it is larger than the sum of its proper divisors (19263552830).

21210313330 is a wasteful number, since it uses less digits than its factorization.

21210313330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152814.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21210313330 its reverse (3331301212), we get a palindrome (24541614542).

The spelling of 21210313330 in words is "twenty-one billion, two hundred ten million, three hundred thirteen thousand, three hundred thirty".