109992221 has 2 divisors, whose sum is σ = 109992222. Its totient is φ = 109992220.

The previous prime is 109992209. The next prime is 109992241. The reversal of 109992221 is 122299901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99720196 + 10272025 = 9986^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 109992221 - 2¹⁰ = 109991197 is a prime.

It is equal to p_6302897 and since 109992221 and 6302897 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109992241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54996110 + 54996111.

It is an arithmetic number, because the mean of its divisors is an integer number (54996111).

Almost surely, 2^109992221 is an apocalyptic number.

It is an amenable number.

109992221 is a deficient number, since it is larger than the sum of its proper divisors (1).

109992221 is an equidigital number, since it uses as much as digits as its factorization.

109992221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 109992221 is about 10487.7176258707. The cubic root of 109992221 is about 479.1306907567.

The spelling of 109992221 in words is "one hundred nine million, nine hundred ninety-two thousand, two hundred twenty-one".