20010120221121 has 16 divisors (see below), whose sum is σ = 27537327110400. Its totient is φ = 12918246085008.

The previous prime is 20010120221053. The next prime is 20010120221177. The reversal of 20010120221121 is 12112202101002.

It is not a de Polignac number, because 20010120221121 - 2¹⁸ = 20010119958977 is a prime.

It is a super-2 number, since 2×20010120221121² (a number of 27 digits) contains 22 as substring.

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 20010120221121.

It is not an unprimeable number, because it can be changed into a prime (20010120211121) 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, 843656251 + ... + 843679968.

It is an arithmetic number, because the mean of its divisors is an integer number (1721082944400).

Almost surely, 2^{20010120221121} is an apocalyptic number.

It is an amenable number.

20010120221121 is a deficient number, since it is larger than the sum of its proper divisors (7527206889279).

20010120221121 is a wasteful number, since it uses less digits than its factorization.

20010120221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687336348.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20010120221121 its reverse (12112202101002), we get a palindrome (32122322322123).

The spelling of 20010120221121 in words is "twenty trillion, ten billion, one hundred twenty million, two hundred twenty-one thousand, one hundred twenty-one".