11420043109 has 2 divisors, whose sum is σ = 11420043110. Its totient is φ = 11420043108.

The previous prime is 11420043079. The next prime is 11420043121. The reversal of 11420043109 is 90134002411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11300753025 + 119290084 = 106305^2 + 10922^2 .

It is a cyclic number.

It is not a de Polignac number, because 11420043109 - 2⁵ = 11420043077 is a prime.

It is a super-2 number, since 2×11420043109² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11420043149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710021554 + 5710021555.

It is an arithmetic number, because the mean of its divisors is an integer number (5710021555).

Almost surely, 2^11420043109 is an apocalyptic number.

It is an amenable number.

11420043109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11420043109 is an equidigital number, since it uses as much as digits as its factorization.

11420043109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 11420043109 in words is "eleven billion, four hundred twenty million, forty-three thousand, one hundred nine".