2161044372301 has 4 divisors (see below), whose sum is σ = 2161059783100. Its totient is φ = 2161028961504.

The previous prime is 2161044372299. The next prime is 2161044372317. The reversal of 2161044372301 is 1032734401612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 235929747076 + 1925114625225 = 485726^2 + 1387485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161044372301 - 2¹ = 2161044372299 is a prime.

It is a super-2 number, since 2×2161044372301² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161044372001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7493106 + ... + 7776163.

It is an arithmetic number, because the mean of its divisors is an integer number (540264945775).

Almost surely, 2^{2161044372301} is an apocalyptic number.

It is an amenable number.

2161044372301 is a deficient number, since it is larger than the sum of its proper divisors (15410799).

2161044372301 is a wasteful number, since it uses less digits than its factorization.

2161044372301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15410798.

The product of its (nonzero) digits is 24192, while the sum is 34.

Adding to 2161044372301 its reverse (1032734401612), we get a palindrome (3193778773913).

The spelling of 2161044372301 in words is "two trillion, one hundred sixty-one billion, forty-four million, three hundred seventy-two thousand, three hundred one".