2156261061101 has 8 divisors (see below), whose sum is σ = 2465178170304. Its totient is φ = 1847563905600.

The previous prime is 2156261061061. The next prime is 2156261061103. The reversal of 2156261061101 is 1011601626512.

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

It is not a de Polignac number, because 2156261061101 - 2¹⁸ = 2156260798957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156261061103) 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 7 ways as a sum of consecutive naturals, for example, 54967415 + ... + 55006628.

It is an arithmetic number, because the mean of its divisors is an integer number (308147271288).

Almost surely, 2^{2156261061101} is an apocalyptic number.

It is an amenable number.

2156261061101 is a deficient number, since it is larger than the sum of its proper divisors (308917109203).

2156261061101 is a wasteful number, since it uses less digits than its factorization.

2156261061101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109976851.

The product of its (nonzero) digits is 4320, while the sum is 32.

Adding to 2156261061101 its reverse (1011601626512), we get a palindrome (3167862687613).

The spelling of 2156261061101 in words is "two trillion, one hundred fifty-six billion, two hundred sixty-one million, sixty-one thousand, one hundred one".