20302204121 has 16 divisors (see below), whose sum is σ = 22309852800. Its totient is φ = 18389213568.

The previous prime is 20302204093. The next prime is 20302204163. The reversal of 20302204121 is 12140220302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20302204121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20302204121.

It is not an unprimeable number, because it can be changed into a prime (20302204721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1108325 + ... + 1126493.

It is an arithmetic number, because the mean of its divisors is an integer number (1394365800).

Almost surely, 2^20302204121 is an apocalyptic number.

It is an amenable number.

20302204121 is a deficient number, since it is larger than the sum of its proper divisors (2007648679).

20302204121 is a wasteful number, since it uses less digits than its factorization.

20302204121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20768.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20302204121 its reverse (12140220302), we get a palindrome (32442424423).

The spelling of 20302204121 in words is "twenty billion, three hundred two million, two hundred four thousand, one hundred twenty-one".