20201222221121 has 8 divisors (see below), whose sum is σ = 20244815416800. Its totient is φ = 20157630461248.

The previous prime is 20201222221111. The next prime is 20201222221127. The reversal of 20201222221121 is 12112222210202.

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 20201222221121 - 2⁶ = 20201222221057 is a prime.

It is a super-2 number, since 2×20201222221121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201222221093 and 20201222221102.

It is not an unprimeable number, because it can be changed into a prime (20201222221127) 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, 30706190 + ... + 31357176.

It is an arithmetic number, because the mean of its divisors is an integer number (2530601927100).

Almost surely, 2^{20201222221121} is an apocalyptic number.

It is an amenable number.

20201222221121 is a deficient number, since it is larger than the sum of its proper divisors (43593195679).

20201222221121 is an equidigital number, since it uses as much as digits as its factorization.

20201222221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717903.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20201222221121 its reverse (12112222210202), we get a palindrome (32313444431323).

The spelling of 20201222221121 in words is "twenty trillion, two hundred one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".