109907221 has 2 divisors, whose sum is σ = 109907222. Its totient is φ = 109907220.

The previous prime is 109907201. The next prime is 109907233. The reversal of 109907221 is 122709901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90459121 + 19448100 = 9511^2 + 4410^2 .

It is an emirp because it is prime and its reverse (122709901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109907221 - 2⁷ = 109907093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109907201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54953610 + 54953611.

It is an arithmetic number, because the mean of its divisors is an integer number (54953611).

Almost surely, 2^109907221 is an apocalyptic number.

It is an amenable number.

109907221 is a deficient number, since it is larger than the sum of its proper divisors (1).

109907221 is an equidigital number, since it uses as much as digits as its factorization.

109907221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 109907221 is about 10483.6644833760. The cubic root of 109907221 is about 479.0072377717.

The spelling of 109907221 in words is "one hundred nine million, nine hundred seven thousand, two hundred twenty-one".