920102221 has 4 divisors (see below), whose sum is σ = 939678912. Its totient is φ = 900525532.

The previous prime is 920102219. The next prime is 920102233. The reversal of 920102221 is 122201029.

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 an emirpimes, since its reverse is a distinct semiprime: 122201029 = 7723 ⋅15823.

It is a cyclic number.

It is not a de Polignac number, because 920102221 - 2¹ = 920102219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920102251) 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, 9788275 + ... + 9788368.

It is an arithmetic number, because the mean of its divisors is an integer number (234919728).

Almost surely, 2^920102221 is an apocalyptic number.

It is an amenable number.

920102221 is a deficient number, since it is larger than the sum of its proper divisors (19576691).

920102221 is a wasteful number, since it uses less digits than its factorization.

920102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19576690.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 920102221 is about 30333.1867926863. The cubic root of 920102221 is about 972.6248462625.

The spelling of 920102221 in words is "nine hundred twenty million, one hundred two thousand, two hundred twenty-one".