109211731 has 2 divisors, whose sum is σ = 109211732. Its totient is φ = 109211730.

The previous prime is 109211719. The next prime is 109211761. The reversal of 109211731 is 137112901.

It is a weak prime.

It is an emirp because it is prime and its reverse (137112901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109211731 - 2¹⁵ = 109178963 is a prime.

It is a super-2 number, since 2×109211731² = 23854404376032722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 109211696 and 109211705.

It is not a weakly prime, because it can be changed into another prime (109211761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54605865 + 54605866.

It is an arithmetic number, because the mean of its divisors is an integer number (54605866).

Almost surely, 2^109211731 is an apocalyptic number.

109211731 is a deficient number, since it is larger than the sum of its proper divisors (1).

109211731 is an equidigital number, since it uses as much as digits as its factorization.

109211731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 109211731 is about 10450.4416653077. The cubic root of 109211731 is about 477.9947172960.

The spelling of 109211731 in words is "one hundred nine million, two hundred eleven thousand, seven hundred thirty-one".