1111010999921 has 2 divisors, whose sum is σ = 1111010999922. Its totient is φ = 1111010999920.

The previous prime is 1111010999899. The next prime is 1111011000023. The reversal of 1111010999921 is 1299990101111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655873219600 + 455137780321 = 809860^2 + 674639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111010999921 - 2³⁰ = 1109937258097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1111010999321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555505499960 + 555505499961.

It is an arithmetic number, because the mean of its divisors is an integer number (555505499961).

Almost surely, 2^{1111010999921} is an apocalyptic number.

It is an amenable number.

1111010999921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111010999921 is an equidigital number, since it uses as much as digits as its factorization.

1111010999921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 44.

The spelling of 1111010999921 in words is "one trillion, one hundred eleven billion, ten million, nine hundred ninety-nine thousand, nine hundred twenty-one".