20321203022121 has 8 divisors (see below), whose sum is σ = 27117201079584. Its totient is φ = 13536336823040.

The previous prime is 20321203022047. The next prime is 20321203022171. The reversal of 20321203022121 is 12122030212302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20321203022121 - 2³⁷ = 20183764068649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20321203022171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2782960335 + ... + 2782967636.

It is an arithmetic number, because the mean of its divisors is an integer number (3389650134948).

Almost surely, 2^{20321203022121} is an apocalyptic number.

It is an amenable number.

20321203022121 is a deficient number, since it is larger than the sum of its proper divisors (6795998057463).

20321203022121 is a wasteful number, since it uses less digits than its factorization.

20321203022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565929191.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20321203022121 its reverse (12122030212302), we get a palindrome (32443233234423).

The spelling of 20321203022121 in words is "twenty trillion, three hundred twenty-one billion, two hundred three million, twenty-two thousand, one hundred twenty-one".