1100043420409 has 2 divisors, whose sum is σ = 1100043420410. Its totient is φ = 1100043420408.

The previous prime is 1100043420389. The next prime is 1100043420457. The reversal of 1100043420409 is 9040243400011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 623108154384 + 476935266025 = 789372^2 + 690605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100043420409 - 2²³ = 1100035031801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1100043420209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550021710204 + 550021710205.

It is an arithmetic number, because the mean of its divisors is an integer number (550021710205).

Almost surely, 2^{1100043420409} is an apocalyptic number.

It is an amenable number.

1100043420409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100043420409 is an equidigital number, since it uses as much as digits as its factorization.

1100043420409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 1100043420409 in words is "one trillion, one hundred billion, forty-three million, four hundred twenty thousand, four hundred nine".