11420431117 has 2 divisors, whose sum is σ = 11420431118. Its totient is φ = 11420431116.

The previous prime is 11420431079. The next prime is 11420431123. The reversal of 11420431117 is 71113402411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6192273481 + 5228157636 = 78691^2 + 72306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11420431117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11420431091 and 11420431100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11420431157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710215558 + 5710215559.

It is an arithmetic number, because the mean of its divisors is an integer number (5710215559).

Almost surely, 2^11420431117 is an apocalyptic number.

It is an amenable number.

11420431117 is a deficient number, since it is larger than the sum of its proper divisors (1).

11420431117 is an equidigital number, since it uses as much as digits as its factorization.

11420431117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 11420431117 its reverse (71113402411), we get a palindrome (82533833528).

The spelling of 11420431117 in words is "eleven billion, four hundred twenty million, four hundred thirty-one thousand, one hundred seventeen".