2205501521101 has 4 divisors (see below), whose sum is σ = 2241657283804. Its totient is φ = 2169345758400.

The previous prime is 2205501521071. The next prime is 2205501521123. The reversal of 2205501521101 is 1011251055022.

It is a happy number.

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 44383955625 + 2161117565476 = 210675^2 + 1470074^2 .

It is a cyclic number.

It is not a de Polignac number, because 2205501521101 - 2⁹ = 2205501520589 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 (2205501521131) 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, 18077881260 + ... + 18077881381.

It is an arithmetic number, because the mean of its divisors is an integer number (560414320951).

Almost surely, 2^{2205501521101} is an apocalyptic number.

It is an amenable number.

2205501521101 is a deficient number, since it is larger than the sum of its proper divisors (36155762703).

2205501521101 is an equidigital number, since it uses as much as digits as its factorization.

2205501521101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36155762702.

The product of its (nonzero) digits is 1000, while the sum is 25.

Adding to 2205501521101 its reverse (1011251055022), we get a palindrome (3216752576123).

The spelling of 2205501521101 in words is "two trillion, two hundred five billion, five hundred one million, five hundred twenty-one thousand, one hundred one".