21130101203 has 4 divisors (see below), whose sum is σ = 21131544000. Its totient is φ = 21128658408.

The previous prime is 21130101199. The next prime is 21130101257. The reversal of 21130101203 is 30210103112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21130101203 - 2² = 21130101199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21130101803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699203 + ... + 728796.

It is an arithmetic number, because the mean of its divisors is an integer number (5282886000).

Almost surely, 2^21130101203 is an apocalyptic number.

21130101203 is a deficient number, since it is larger than the sum of its proper divisors (1442797).

21130101203 is a wasteful number, since it uses less digits than its factorization.

21130101203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442796.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21130101203 its reverse (30210103112), we get a palindrome (51340204315).

The spelling of 21130101203 in words is "twenty-one billion, one hundred thirty million, one hundred one thousand, two hundred three".