11001423421 has 2 divisors, whose sum is σ = 11001423422. Its totient is φ = 11001423420.

The previous prime is 11001423373. The next prime is 11001423449. The reversal of 11001423421 is 12432410011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10488627396 + 512796025 = 102414^2 + 22645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11001423421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11001423481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500711710 + 5500711711.

It is an arithmetic number, because the mean of its divisors is an integer number (5500711711).

Almost surely, 2^11001423421 is an apocalyptic number.

It is an amenable number.

11001423421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001423421 is an equidigital number, since it uses as much as digits as its factorization.

11001423421 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 11001423421 its reverse (12432410011), we get a palindrome (23433833432).

The spelling of 11001423421 in words is "eleven billion, one million, four hundred twenty-three thousand, four hundred twenty-one".