60091221 has 4 divisors (see below), whose sum is σ = 80121632. Its totient is φ = 40060812.

The previous prime is 60091183. The next prime is 60091223. The reversal of 60091221 is 12219006.

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 60091221 - 2¹⁰ = 60090197 is a prime.

It is a super-2 number, since 2×60091221² = 7221909682541682, 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 (60091223) 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, 10015201 + ... + 10015206.

It is an arithmetic number, because the mean of its divisors is an integer number (20030408).

Almost surely, 2^60091221 is an apocalyptic number.

It is an amenable number.

60091221 is a deficient number, since it is larger than the sum of its proper divisors (20030411).

60091221 is a wasteful number, since it uses less digits than its factorization.

60091221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20030410.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 60091221 is about 7751.8527462794. The cubic root of 60091221 is about 391.6850626237.

The spelling of 60091221 in words is "sixty million, ninety-one thousand, two hundred twenty-one".