109223921 has 2 divisors, whose sum is σ = 109223922. Its totient is φ = 109223920.

The previous prime is 109223897. The next prime is 109223957. The reversal of 109223921 is 129322901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98406400 + 10817521 = 9920^2 + 3289^2 .

It is a cyclic number.

It is not a de Polignac number, because 109223921 - 2¹⁴ = 109207537 is a prime.

It is a super-2 number, since 2×109223921² = 23859729837228482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (109223321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54611960 + 54611961.

It is an arithmetic number, because the mean of its divisors is an integer number (54611961).

Almost surely, 2^109223921 is an apocalyptic number.

It is an amenable number.

109223921 is a deficient number, since it is larger than the sum of its proper divisors (1).

109223921 is an equidigital number, since it uses as much as digits as its factorization.

109223921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 109223921 is about 10451.0248779725. The cubic root of 109223921 is about 478.0125009131.

The spelling of 109223921 in words is "one hundred nine million, two hundred twenty-three thousand, nine hundred twenty-one".