221041020253 has 4 divisors (see below), whose sum is σ = 223229545308. Its totient is φ = 218852495200.

The previous prime is 221041020251. The next prime is 221041020329. The reversal of 221041020253 is 352020140122.

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 93750478969 + 127290541284 = 306187^2 + 356778^2 .

It is a cyclic number.

It is not a de Polignac number, because 221041020253 - 2¹ = 221041020251 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 (221041020251) 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, 1094262376 + ... + 1094262577.

It is an arithmetic number, because the mean of its divisors is an integer number (55807386327).

Almost surely, 2^221041020253 is an apocalyptic number.

It is an amenable number.

221041020253 is a deficient number, since it is larger than the sum of its proper divisors (2188525055).

221041020253 is a wasteful number, since it uses less digits than its factorization.

221041020253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188525054.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 221041020253 its reverse (352020140122), we get a palindrome (573061160375).

The spelling of 221041020253 in words is "two hundred twenty-one billion, forty-one million, twenty thousand, two hundred fifty-three".