2156055065201 has 4 divisors (see below), whose sum is σ = 2269531647600. Its totient is φ = 2042578482804.

The previous prime is 2156055065159. The next prime is 2156055065257. The reversal of 2156055065201 is 1025605506512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2156055065201 - 2¹⁴ = 2156055048817 is a prime.

It is a super-2 number, since 2×2156055065201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2156055065261) 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, 56738291171 + ... + 56738291208.

It is an arithmetic number, because the mean of its divisors is an integer number (567382911900).

Almost surely, 2^{2156055065201} is an apocalyptic number.

It is an amenable number.

2156055065201 is a deficient number, since it is larger than the sum of its proper divisors (113476582399).

2156055065201 is a wasteful number, since it uses less digits than its factorization.

2156055065201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113476582398.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 2156055065201 in words is "two trillion, one hundred fifty-six billion, fifty-five million, sixty-five thousand, two hundred one".