221130255642245 has 4 divisors (see below), whose sum is σ = 265356306770700. Its totient is φ = 176904204513792.

The previous prime is 221130255642227. The next prime is 221130255642311. The reversal of 221130255642245 is 542246552031122.

221130255642245 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 173960034950881 + 47170220691364 = 13189391^2 + 6868058^2 .

It is a cyclic number.

It is not a de Polignac number, because 221130255642245 - 2¹⁰ = 221130255641221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221130255642196 and 221130255642205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22113025564220 + ... + 22113025564229.

It is an arithmetic number, because the mean of its divisors is an integer number (66339076692675).

Almost surely, 2^{221130255642245} is an apocalyptic number.

It is an amenable number.

221130255642245 is a deficient number, since it is larger than the sum of its proper divisors (44226051128455).

221130255642245 is an equidigital number, since it uses as much as digits as its factorization.

221130255642245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44226051128454.

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 221130255642245 in words is "two hundred twenty-one trillion, one hundred thirty billion, two hundred fifty-five million, six hundred forty-two thousand, two hundred forty-five".