20211201021121 has 8 divisors (see below), whose sum is σ = 23345558398944. Its totient is φ = 17293006221120.

The previous prime is 20211201021079. The next prime is 20211201021133. The reversal of 20211201021121 is 12112010211202.

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 20211201021121 - 2¹⁵ = 20211200988353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211201021095 and 20211201021104.

It is not an unprimeable number, because it can be changed into a prime (20211201021821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54040644255 + ... + 54040644628.

It is an arithmetic number, because the mean of its divisors is an integer number (2918194799868).

Almost surely, 2^{20211201021121} is an apocalyptic number.

It is an amenable number.

20211201021121 is a deficient number, since it is larger than the sum of its proper divisors (3134357377823).

20211201021121 is a wasteful number, since it uses less digits than its factorization.

20211201021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108081288911.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20211201021121 its reverse (12112010211202), we get a palindrome (32323211232323).

The spelling of 20211201021121 in words is "twenty trillion, two hundred eleven billion, two hundred one million, twenty-one thousand, one hundred twenty-one".