21102344002 has 16 divisors (see below), whose sum is σ = 32277320640. Its totient is φ = 10343565232.

The previous prime is 21102343987. The next prime is 21102344009. The reversal of 21102344002 is 20044320112.

It is not an unprimeable number, because it can be changed into a prime (21102344009) 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 7 ways as a sum of consecutive naturals, for example, 48249 + ... + 211027.

It is an arithmetic number, because the mean of its divisors is an integer number (2017332540).

Almost surely, 2^21102344002 is an apocalyptic number.

21102344002 is a deficient number, since it is larger than the sum of its proper divisors (11174976638).

21102344002 is a wasteful number, since it uses less digits than its factorization.

21102344002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164057.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21102344002 its reverse (20044320112), we get a palindrome (41146664114).

It can be divided in two parts, 211023 and 44002, that added together give a square (255025 = 505²).

The spelling of 21102344002 in words is "twenty-one billion, one hundred two million, three hundred forty-four thousand, two".