21002103203230 has 16 divisors (see below), whose sum is σ = 37937368052784. Its totient is φ = 8371156328640.

The previous prime is 21002103203161. The next prime is 21002103203233. The reversal of 21002103203230 is 3230230120012.

It is a junction number, because it is equal to n+sod(n) for n = 21002103203198 and 21002103203207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002103203233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3710616111 + ... + 3710621770.

It is an arithmetic number, because the mean of its divisors is an integer number (2371085503299).

Almost surely, 2^{21002103203230} is an apocalyptic number.

21002103203230 is a deficient number, since it is larger than the sum of its proper divisors (16935264849554).

21002103203230 is a wasteful number, since it uses less digits than its factorization.

21002103203230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7421238171.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21002103203230 its reverse (3230230120012), we get a palindrome (24232333323242).

The spelling of 21002103203230 in words is "twenty-one trillion, two billion, one hundred three million, two hundred three thousand, two hundred thirty".