61201026122161 has 4 divisors (see below), whose sum is σ = 63311406333300. Its totient is φ = 59090645911024.

The previous prime is 61201026122147. The next prime is 61201026122191. The reversal of 61201026122161 is 16122162010216.

It is a happy number.

61201026122161 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 48930584601600 + 12270441520561 = 6995040^2 + 3502919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61201026122161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61201026122111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055190105526 + ... + 1055190105583.

It is an arithmetic number, because the mean of its divisors is an integer number (15827851583325).

Almost surely, 2^{61201026122161} is an apocalyptic number.

It is an amenable number.

61201026122161 is a deficient number, since it is larger than the sum of its proper divisors (2110380211139).

61201026122161 is a wasteful number, since it uses less digits than its factorization.

61201026122161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110380211138.

The product of its (nonzero) digits is 3456, while the sum is 31.

Adding to 61201026122161 its reverse (16122162010216), we get a palindrome (77323188132377).

The spelling of 61201026122161 in words is "sixty-one trillion, two hundred one billion, twenty-six million, one hundred twenty-two thousand, one hundred sixty-one".