20211200203121 has 8 divisors (see below), whose sum is σ = 20251343030688. Its totient is φ = 20171062548000.

The previous prime is 20211200203099. The next prime is 20211200203123. The reversal of 20211200203121 is 12130200211202.

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 20211200203121 - 2¹⁰ = 20211200202097 is a prime.

It is a super-2 number, since 2×20211200203121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20211200203121.

It is not an unprimeable number, because it can be changed into a prime (20211200203123) 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, 6577106 + ... + 9147716.

It is an arithmetic number, because the mean of its divisors is an integer number (2531417878836).

Almost surely, 2^{20211200203121} is an apocalyptic number.

It is an amenable number.

20211200203121 is a deficient number, since it is larger than the sum of its proper divisors (40142827567).

20211200203121 is a wasteful number, since it uses less digits than its factorization.

20211200203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586223.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20211200203121 its reverse (12130200211202), we get a palindrome (32341400414323).

The spelling of 20211200203121 in words is "twenty trillion, two hundred eleven billion, two hundred million, two hundred three thousand, one hundred twenty-one".