2201405121 has 20 divisors (see below), whose sum is σ = 3325479300. Its totient is φ = 1451108736.

The previous prime is 2201405117. The next prime is 2201405177. The reversal of 2201405121 is 1215041022.

It can be written as a sum of positive squares in 2 ways, for example, as 842450625 + 1358954496 = 29025^2 + 36864^2 .

It is not a de Polignac number, because 2201405121 - 2² = 2201405117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2201405094 and 2201405103.

It is not an unprimeable number, because it can be changed into a prime (2201405221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 145476 + ... + 159893.

It is an arithmetic number, because the mean of its divisors is an integer number (166273965).

Almost surely, 2^2201405121 is an apocalyptic number.

It is an amenable number.

2201405121 is a deficient number, since it is larger than the sum of its proper divisors (1124074179).

2201405121 is an equidigital number, since it uses as much as digits as its factorization.

2201405121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305470 (or 305461 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2201405121 is about 46919.1338475040. The cubic root of 2201405121 is about 1300.8682800977.

Adding to 2201405121 its reverse (1215041022), we get a palindrome (3416446143).

The spelling of 2201405121 in words is "two billion, two hundred one million, four hundred five thousand, one hundred twenty-one".