273106021221 has 16 divisors (see below), whose sum is σ = 441383469120. Its totient is φ = 165518800560.

The previous prime is 273106021189. The next prime is 273106021259. The reversal of 273106021221 is 122120601372.

273106021221 is a `hidden beast` number, since 2 + 7 + 31 + 0 + 602 + 1 + 2 + 21 = 666.

It is not a de Polignac number, because 273106021221 - 2⁵ = 273106021189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273106021421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459774150 + ... + 459774743.

It is an arithmetic number, because the mean of its divisors is an integer number (27586466820).

Almost surely, 2^273106021221 is an apocalyptic number.

It is an amenable number.

273106021221 is a deficient number, since it is larger than the sum of its proper divisors (168277447899).

273106021221 is a wasteful number, since it uses less digits than its factorization.

273106021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919548913 (or 919548907 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 273106021221 its reverse (122120601372), we get a palindrome (395226622593).

It can be divided in two parts, 2731060 and 21221, that added together give a square (2752281 = 1659²).

The spelling of 273106021221 in words is "two hundred seventy-three billion, one hundred six million, twenty-one thousand, two hundred twenty-one".