20221211121121 has 16 divisors (see below), whose sum is σ = 20714454243648. Its totient is φ = 19729017000000.

The previous prime is 20221211121119. The next prime is 20221211121149. The reversal of 20221211121121 is 12112111212202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20221211121121 - 2¹ = 20221211121119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221211121151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525193371 + ... + 525231871.

It is an arithmetic number, because the mean of its divisors is an integer number (1294653390228).

Almost surely, 2^{20221211121121} is an apocalyptic number.

It is an amenable number.

20221211121121 is a deficient number, since it is larger than the sum of its proper divisors (493243122527).

20221211121121 is a wasteful number, since it uses less digits than its factorization.

20221211121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51792.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 20221211121121 its reverse (12112111212202), we get a palindrome (32333322333323).

The spelling of 20221211121121 in words is "twenty trillion, two hundred twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, one hundred twenty-one".