1000109999921 has 2 divisors, whose sum is σ = 1000109999922. Its totient is φ = 1000109999920.

The previous prime is 1000109999887. The next prime is 1000110000013. The reversal of 1000109999921 is 1299999010001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 998472583696 + 1637416225 = 999236^2 + 40465^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000109999921 - 2⁶ = 1000109999857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000109999921.

It is not a weakly prime, because it can be changed into another prime (1000109995921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500054999960 + 500054999961.

It is an arithmetic number, because the mean of its divisors is an integer number (500054999961).

Almost surely, 2^{1000109999921} is an apocalyptic number.

It is an amenable number.

1000109999921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000109999921 is an equidigital number, since it uses as much as digits as its factorization.

1000109999921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 50.

The spelling of 1000109999921 in words is "one trillion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred twenty-one".