12021321303 has 6 divisors (see below), whose sum is σ = 17364130784. Its totient is φ = 8014214196.

The previous prime is 12021321287. The next prime is 12021321307. The reversal of 12021321303 is 30312312021.

12021321303 is a `hidden beast` number, since 1 + 20 + 21 + 321 + 303 = 666.

It is not a de Polignac number, because 12021321303 - 2⁴ = 12021321287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021321307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667851175 + ... + 667851192.

Almost surely, 2^12021321303 is an apocalyptic number.

12021321303 is a deficient number, since it is larger than the sum of its proper divisors (5342809481).

12021321303 is a wasteful number, since it uses less digits than its factorization.

12021321303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335702373 (or 1335702370 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12021321303 its reverse (30312312021), we get a palindrome (42333633324).

The spelling of 12021321303 in words is "twelve billion, twenty-one million, three hundred twenty-one thousand, three hundred three".