20112121220201 has 8 divisors (see below), whose sum is σ = 20654140450944. Its totient is φ = 19573479056880.

The previous prime is 20112121220183. The next prime is 20112121220353. The reversal of 20112121220201 is 10202212121102.

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 20112121220201 - 2²⁶ = 20112054111337 is a prime.

It is a super-2 number, since 2×20112121220201² (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 20112121220201.

It is not an unprimeable number, because it can be changed into a prime (20112121220501) 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, 844254785 + ... + 844278606.

It is an arithmetic number, because the mean of its divisors is an integer number (2581767556368).

Almost surely, 2^{20112121220201} is an apocalyptic number.

It is an amenable number.

20112121220201 is a deficient number, since it is larger than the sum of its proper divisors (542019230743).

20112121220201 is a wasteful number, since it uses less digits than its factorization.

20112121220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688533711.

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

Adding to 20112121220201 its reverse (10202212121102), we get a palindrome (30314333341303).

Subtracting from 20112121220201 its reverse (10202212121102), we obtain a palindrome (9909909099099).

The spelling of 20112121220201 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-one million, two hundred twenty thousand, two hundred one".