21132102004 has 48 divisors (see below), whose sum is σ = 40954690000. Its totient is φ = 9477513216.

The previous prime is 21132102001. The next prime is 21132102053. The reversal of 21132102004 is 40020123112.

It can be written as a sum of positive squares in 8 ways, for example, as 64160100 + 21067941904 = 8010^2 + 145148^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132102001) 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, 1588372 + ... + 1601620.

Almost surely, 2^21132102004 is an apocalyptic number.

It is an amenable number.

21132102004 is a deficient number, since it is larger than the sum of its proper divisors (19822587996).

21132102004 is a wasteful number, since it uses less digits than its factorization.

21132102004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14132 (or 14130 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21132102004 its reverse (40020123112), we get a palindrome (61152225116).

The spelling of 21132102004 in words is "twenty-one billion, one hundred thirty-two million, one hundred two thousand, four".