3421261265161 has 4 divisors (see below), whose sum is σ = 3452648983300. Its totient is φ = 3389873547024.

The previous prime is 3421261265141. The next prime is 3421261265173. The reversal of 3421261265161 is 1615621621243.

3421261265161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1372552833600 + 2048708431561 = 1171560^2 + 1431331^2 .

It is a cyclic number.

It is not a de Polignac number, because 3421261265161 - 2²⁷ = 3421127047433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3421261265131) 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, 15693858906 + ... + 15693859123.

It is an arithmetic number, because the mean of its divisors is an integer number (863162245825).

Almost surely, 2^{3421261265161} is an apocalyptic number.

It is an amenable number.

3421261265161 is a deficient number, since it is larger than the sum of its proper divisors (31387718139).

3421261265161 is a wasteful number, since it uses less digits than its factorization.

3421261265161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31387718138.

The product of its digits is 103680, while the sum is 40.

The spelling of 3421261265161 in words is "three trillion, four hundred twenty-one billion, two hundred sixty-one million, two hundred sixty-five thousand, one hundred sixty-one".