11155655221201 has 4 divisors (see below), whose sum is σ = 11254377833892. Its totient is φ = 11056932608512.

The previous prime is 11155655221169. The next prime is 11155655221211. The reversal of 11155655221201 is 10212255655111.

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 1164998581201 + 9990656640000 = 1079351^2 + 3160800^2 .

It is a cyclic number.

It is not a de Polignac number, because 11155655221201 - 2⁵ = 11155655221169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11155655221211) 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, 49361306176 + ... + 49361306401.

It is an arithmetic number, because the mean of its divisors is an integer number (2813594458473).

Almost surely, 2^{11155655221201} is an apocalyptic number.

It is an amenable number.

11155655221201 is a deficient number, since it is larger than the sum of its proper divisors (98722612691).

11155655221201 is an equidigital number, since it uses as much as digits as its factorization.

11155655221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98722612690.

The product of its (nonzero) digits is 30000, while the sum is 37.

The spelling of 11155655221201 in words is "eleven trillion, one hundred fifty-five billion, six hundred fifty-five million, two hundred twenty-one thousand, two hundred one".