2121120121223 has 16 divisors (see below), whose sum is σ = 2287354470240. Its totient is φ = 1960351372800.

The previous prime is 2121120121207. The next prime is 2121120121273. The reversal of 2121120121223 is 3221210211212.

It is a cyclic number.

It is not a de Polignac number, because 2121120121223 - 2⁴ = 2121120121207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121120121195 and 2121120121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121120121273) 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, 14370011 + ... + 14516867.

It is an arithmetic number, because the mean of its divisors is an integer number (142959654390).

Almost surely, 2^{2121120121223} is an apocalyptic number.

2121120121223 is a deficient number, since it is larger than the sum of its proper divisors (166234349017).

2121120121223 is a wasteful number, since it uses less digits than its factorization.

2121120121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165458.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2121120121223 its reverse (3221210211212), we get a palindrome (5342330332435).

The spelling of 2121120121223 in words is "two trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twenty-three".