21321100432010 has 16 divisors (see below), whose sum is σ = 38382259897800. Its totient is φ = 8527489257216.

The previous prime is 21321100431979. The next prime is 21321100432013. The reversal of 21321100432010 is 1023400112312.

It can be written as a sum of positive squares in 4 ways, for example, as 14835261645649 + 6485838786361 = 3851657^2 + 2546731^2 .

It is not an unprimeable number, because it can be changed into a prime (21321100432013) 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 7 ways as a sum of consecutive naturals, for example, 118770275 + ... + 118949654.

Almost surely, 2^{21321100432010} is an apocalyptic number.

21321100432010 is a deficient number, since it is larger than the sum of its proper divisors (17061159465790).

21321100432010 is a wasteful number, since it uses less digits than its factorization.

21321100432010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237728905.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21321100432010 its reverse (1023400112312), we get a palindrome (22344500544322).

The spelling of 21321100432010 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred million, four hundred thirty-two thousand, ten".