11420043121 has 2 divisors, whose sum is σ = 11420043122. Its totient is φ = 11420043120.

The previous prime is 11420043109. The next prime is 11420043149. The reversal of 11420043121 is 12134002411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10304483121 + 1115560000 = 101511^2 + 33400^2 .

It is a cyclic number.

It is not a de Polignac number, because 11420043121 - 2¹³ = 11420034929 is a prime.

It is not a weakly prime, because it can be changed into another prime (11420043161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710021560 + 5710021561.

It is an arithmetic number, because the mean of its divisors is an integer number (5710021561).

Almost surely, 2^11420043121 is an apocalyptic number.

It is an amenable number.

11420043121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11420043121 is an equidigital number, since it uses as much as digits as its factorization.

11420043121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 11420043121 its reverse (12134002411), we get a palindrome (23554045532).

The spelling of 11420043121 in words is "eleven billion, four hundred twenty million, forty-three thousand, one hundred twenty-one".