20121003304 has 8 divisors (see below), whose sum is σ = 37726881210. Its totient is φ = 10060501648.

The previous prime is 20121003239. The next prime is 20121003307. The reversal of 20121003304 is 40330012102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19656600804 + 464402500 = 140202^2 + 21550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20121003307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257562699 + ... + 1257562714.

Almost surely, 2^20121003304 is an apocalyptic number.

It is an amenable number.

20121003304 is a deficient number, since it is larger than the sum of its proper divisors (17605877906).

20121003304 is a wasteful number, since it uses less digits than its factorization.

20121003304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515125419 (or 2515125415 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20121003304 its reverse (40330012102), we get a palindrome (60451015406).

The spelling of 20121003304 in words is "twenty billion, one hundred twenty-one million, three thousand, three hundred four".