21033331010 has 32 divisors (see below), whose sum is σ = 38054983680. Its totient is φ = 8370053568.

The previous prime is 21033330979. The next prime is 21033331013. The reversal of 21033331010 is 1013333012.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21033331010.

It is not an unprimeable number, because it can be changed into a prime (21033331013) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5669036 + ... + 5672744.

It is an arithmetic number, because the mean of its divisors is an integer number (1189218240).

Almost surely, 2^21033331010 is an apocalyptic number.

21033331010 is a deficient number, since it is larger than the sum of its proper divisors (17021652670).

21033331010 is a wasteful number, since it uses less digits than its factorization.

21033331010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6482.

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

Adding to 21033331010 its reverse (1013333012), we get a palindrome (22046664022).

The spelling of 21033331010 in words is "twenty-one billion, thirty-three million, three hundred thirty-one thousand, ten".