992010221 has 4 divisors (see below), whose sum is σ = 1026217500. Its totient is φ = 957802944.

The previous prime is 992010181. The next prime is 992010223. The reversal of 992010221 is 122010299.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 666207721 + 325802500 = 25811^2 + 18050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-992010221 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 (992010223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17103596 + ... + 17103653.

It is an arithmetic number, because the mean of its divisors is an integer number (256554375).

Almost surely, 2^992010221 is an apocalyptic number.

It is an amenable number.

992010221 is a deficient number, since it is larger than the sum of its proper divisors (34207279).

992010221 is a wasteful number, since it uses less digits than its factorization.

992010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34207278.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 992010221 is about 31496.1937541666. The cubic root of 992010221 is about 997.3296157286.

The spelling of 992010221 in words is "nine hundred ninety-two million, ten thousand, two hundred twenty-one".