20121120001123 has 4 divisors (see below), whose sum is σ = 20770188388288. Its totient is φ = 19472051613960.

The previous prime is 20121120001121. The next prime is 20121120001163. The reversal of 20121120001123 is 32110002112102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20121120001123 - 2¹ = 20121120001121 is a prime.

It is a super-2 number, since 2×20121120001123² (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 = 20121120001097 and 20121120001106.

It is not an unprimeable number, because it can be changed into a prime (20121120001121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324534193536 + ... + 324534193597.

It is an arithmetic number, because the mean of its divisors is an integer number (5192547097072).

Almost surely, 2^{20121120001123} is an apocalyptic number.

20121120001123 is a deficient number, since it is larger than the sum of its proper divisors (649068387165).

20121120001123 is an equidigital number, since it uses as much as digits as its factorization.

20121120001123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649068387164.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20121120001123 its reverse (32110002112102), we get a palindrome (52231122113225).

The spelling of 20121120001123 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, one thousand, one hundred twenty-three".