21203102002 has 8 divisors (see below), whose sum is σ = 32018107500. Its totient is φ = 10530399504.

The previous prime is 21203101991. The next prime is 21203102017. The reversal of 21203102002 is 20020130212.

21203102002 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 19287376641 + 1915725361 = 138879^2 + 43769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×21203102002³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35575377 + ... + 35575972.

Almost surely, 2^21203102002 is an apocalyptic number.

21203102002 is a deficient number, since it is larger than the sum of its proper divisors (10815005498).

21203102002 is a wasteful number, since it uses less digits than its factorization.

21203102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71151500.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21203102002 its reverse (20020130212), we get a palindrome (41223232214).

The spelling of 21203102002 in words is "twenty-one billion, two hundred three million, one hundred two thousand, two".