2201154421 has 4 divisors (see below), whose sum is σ = 2201248332. Its totient is φ = 2201060512.

The previous prime is 2201154409. The next prime is 2201154443. The reversal of 2201154421 is 1244511022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1244511022 = 2 ⋅622255511.

It can be written as a sum of positive squares in 2 ways, for example, as 1990498225 + 210656196 = 44615^2 + 14514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201154421 - 2¹³ = 2201146229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201154392 and 2201154401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201154401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20625 + ... + 69481.

It is an arithmetic number, because the mean of its divisors is an integer number (550312083).

Almost surely, 2^2201154421 is an apocalyptic number.

It is an amenable number.

2201154421 is a deficient number, since it is larger than the sum of its proper divisors (93911).

2201154421 is an equidigital number, since it uses as much as digits as its factorization.

2201154421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93910.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2201154421 is about 46916.4621534915. The cubic root of 2201154421 is about 1300.8188964782.

Adding to 2201154421 its reverse (1244511022), we get a palindrome (3445665443).

The spelling of 2201154421 in words is "two billion, two hundred one million, one hundred fifty-four thousand, four hundred twenty-one".