21103001204 has 12 divisors (see below), whose sum is σ = 39102620004. Its totient is φ = 9930824064.

The previous prime is 21103001191. The next prime is 21103001209. The reversal of 21103001204 is 40210030112.

It can be written as a sum of positive squares in 2 ways, for example, as 9711708304 + 11391292900 = 98548^2 + 106730^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103001209) 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, 155169059 + ... + 155169194.

It is an arithmetic number, because the mean of its divisors is an integer number (3258551667).

Almost surely, 2^21103001204 is an apocalyptic number.

It is an amenable number.

21103001204 is a deficient number, since it is larger than the sum of its proper divisors (17999618800).

21103001204 is a wasteful number, since it uses less digits than its factorization.

21103001204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310338274 (or 310338272 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21103001204 its reverse (40210030112), we get a palindrome (61313031316).

The spelling of 21103001204 in words is "twenty-one billion, one hundred three million, one thousand, two hundred four".