60181221 has 4 divisors (see below), whose sum is σ = 80241632. Its totient is φ = 40120812.

The previous prime is 60181217. The next prime is 60181237. The reversal of 60181221 is 12218106.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 60181221 - 2² = 60181217 is a prime.

It is a super-2 number, since 2×60181221² = 7243558722101682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60181021) 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, 10030201 + ... + 10030206.

It is an arithmetic number, because the mean of its divisors is an integer number (20060408).

Almost surely, 2^60181221 is an apocalyptic number.

It is an amenable number.

60181221 is a deficient number, since it is larger than the sum of its proper divisors (20060411).

60181221 is a wasteful number, since it uses less digits than its factorization.

60181221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20060410.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 60181221 is about 7757.6556381422. The cubic root of 60181221 is about 391.8805103148.

Adding to 60181221 its reverse (12218106), we get a palindrome (72399327).

The spelling of 60181221 in words is "sixty million, one hundred eighty-one thousand, two hundred twenty-one".