2121160351221 has 6 divisors (see below), whose sum is σ = 3063898285110. Its totient is φ = 1414106900808.

The previous prime is 2121160351183. The next prime is 2121160351283. The reversal of 2121160351221 is 1221530611212.

It is a happy number.

2121160351221 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 1 + 603 + 51 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2120841728721 + 318622500 = 1456311^2 + 17850^2 .

It is not a de Polignac number, because 2121160351221 - 2²⁶ = 2121093242357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121160351721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117842241726 + ... + 117842241743.

It is an arithmetic number, because the mean of its divisors is an integer number (510649714185).

Almost surely, 2^{2121160351221} is an apocalyptic number.

It is an amenable number.

2121160351221 is a deficient number, since it is larger than the sum of its proper divisors (942737933889).

2121160351221 is a wasteful number, since it uses less digits than its factorization.

2121160351221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235684483475 (or 235684483472 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 2121160351221 its reverse (1221530611212), we get a palindrome (3342690962433).

The spelling of 2121160351221 in words is "two trillion, one hundred twenty-one billion, one hundred sixty million, three hundred fifty-one thousand, two hundred twenty-one".