920000221 has 8 divisors (see below), whose sum is σ = 1061075840. Its totient is φ = 781336368.

The previous prime is 920000219. The next prime is 920000243. The reversal of 920000221 is 122000029.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 920000221 - 2¹ = 920000219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 920000195 and 920000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920000201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602121 + ... + 603646.

It is an arithmetic number, because the mean of its divisors is an integer number (132634480).

Almost surely, 2^920000221 is an apocalyptic number.

It is an amenable number.

920000221 is a deficient number, since it is larger than the sum of its proper divisors (141075619).

920000221 is a wasteful number, since it uses less digits than its factorization.

920000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205883.

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

The square root of 920000221 is about 30331.5054192831. The cubic root of 920000221 is about 972.5889040964.

The spelling of 920000221 in words is "nine hundred twenty million, two hundred twenty-one", and thus it is an aban number.