60131221 has 4 divisors (see below), whose sum is σ = 60146944. Its totient is φ = 60115500.

The previous prime is 60131213. The next prime is 60131237. The reversal of 60131221 is 12213106.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 60131221 - 2³ = 60131213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 60131195 and 60131204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60131321) 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, 1996 + ... + 11146.

It is an arithmetic number, because the mean of its divisors is an integer number (15036736).

Almost surely, 2^60131221 is an apocalyptic number.

It is an amenable number.

60131221 is a deficient number, since it is larger than the sum of its proper divisors (15723).

60131221 is an equidigital number, since it uses as much as digits as its factorization.

60131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15722.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 60131221 is about 7754.4323454396. The cubic root of 60131221 is about 391.7719523400.

Adding to 60131221 its reverse (12213106), we get a palindrome (72344327).

The spelling of 60131221 in words is "sixty million, one hundred thirty-one thousand, two hundred twenty-one".