21133213004 has 48 divisors (see below), whose sum is σ = 39629979648. Its totient is φ = 9838116288.

The previous prime is 21133213001. The next prime is 21133213063. The reversal of 21133213004 is 40031233112.

It is a super-2 number, since 2×21133213004² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21133213001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 602189 + ... + 636315.

It is an arithmetic number, because the mean of its divisors is an integer number (825624576).

Almost surely, 2^21133213004 is an apocalyptic number.

It is an amenable number.

21133213004 is a deficient number, since it is larger than the sum of its proper divisors (18496766644).

21133213004 is a wasteful number, since it uses less digits than its factorization.

21133213004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34334 (or 34332 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21133213004 its reverse (40031233112), we get a palindrome (61164446116).

The spelling of 21133213004 in words is "twenty-one billion, one hundred thirty-three million, two hundred thirteen thousand, four".