21010031330 has 16 divisors (see below), whose sum is σ = 37826987904. Its totient is φ = 8402027760.

The previous prime is 21010031311. The next prime is 21010031347. The reversal of 21010031330 is 3313001012.

It is a super-3 number, since 3×21010031330³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

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, 203252 + ... + 288671.

It is an arithmetic number, because the mean of its divisors is an integer number (2364186744).

Almost surely, 2^21010031330 is an apocalyptic number.

21010031330 is a deficient number, since it is larger than the sum of its proper divisors (16816956574).

21010031330 is a wasteful number, since it uses less digits than its factorization.

21010031330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496201.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 21010031330 its reverse (3313001012), we get a palindrome (24323032342).

The spelling of 21010031330 in words is "twenty-one billion, ten million, thirty-one thousand, three hundred thirty".