110121231209909 has 2 divisors, whose sum is σ = 110121231209910. Its totient is φ = 110121231209908.

The previous prime is 110121231209893. The next prime is 110121231210049. The reversal of 110121231209909 is 909902132121011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74956687009009 + 35164544200900 = 8657753^2 + 5929970^2 .

It is a cyclic number.

It is not a de Polignac number, because 110121231209909 - 2⁴ = 110121231209893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110121231209609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55060615604954 + 55060615604955.

It is an arithmetic number, because the mean of its divisors is an integer number (55060615604955).

Almost surely, 2^{110121231209909} is an apocalyptic number.

It is an amenable number.

110121231209909 is a deficient number, since it is larger than the sum of its proper divisors (1).

110121231209909 is an equidigital number, since it uses as much as digits as its factorization.

110121231209909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 41.

The spelling of 110121231209909 in words is "one hundred ten trillion, one hundred twenty-one billion, two hundred thirty-one million, two hundred nine thousand, nine hundred nine".