2153040121205 has 8 divisors (see below), whose sum is σ = 2587487151192. Its totient is φ = 1719872759808.

The previous prime is 2153040121201. The next prime is 2153040121307. The reversal of 2153040121205 is 5021210403512.

It can be written as a sum of positive squares in 4 ways, for example, as 38069082769 + 2114971038436 = 195113^2 + 1454294^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2153040121205 - 2² = 2153040121201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153040121201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319913444 + ... + 319920173.

It is an arithmetic number, because the mean of its divisors is an integer number (323435893899).

Almost surely, 2^{2153040121205} is an apocalyptic number.

It is an amenable number.

2153040121205 is a deficient number, since it is larger than the sum of its proper divisors (434447029987).

2153040121205 is an equidigital number, since it uses as much as digits as its factorization.

2153040121205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639834295.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 2153040121205 its reverse (5021210403512), we get a palindrome (7174250524717).

The spelling of 2153040121205 in words is "two trillion, one hundred fifty-three billion, forty million, one hundred twenty-one thousand, two hundred five".