20221211200121 has 8 divisors (see below), whose sum is σ = 20521540188288. Its totient is φ = 19921313412000.

The previous prime is 20221211200117. The next prime is 20221211200123. The reversal of 20221211200121 is 12100211212202.

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 20221211200121 - 2² = 20221211200117 is a prime.

It is a super-2 number, since 2×20221211200121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20221211200121.

It is not an unprimeable number, because it can be changed into a prime (20221211200123) 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, 107705525 + ... + 107893106.

It is an arithmetic number, because the mean of its divisors is an integer number (2565192523536).

Almost surely, 2^{20221211200121} is an apocalyptic number.

It is an amenable number.

20221211200121 is a deficient number, since it is larger than the sum of its proper divisors (300328988167).

20221211200121 is a wasteful number, since it uses less digits than its factorization.

20221211200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215600023.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20221211200121 its reverse (12100211212202), we get a palindrome (32321422412323).

The spelling of 20221211200121 in words is "twenty trillion, two hundred twenty-one billion, two hundred eleven million, two hundred thousand, one hundred twenty-one".