11101424021 has 2 divisors, whose sum is σ = 11101424022. Its totient is φ = 11101424020.

The previous prime is 11101423969. The next prime is 11101424023. The reversal of 11101424021 is 12042410111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7244392996 + 3857031025 = 85114^2 + 62105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11101424021 is a prime.

Together with 11101424023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11101424023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550712010 + 5550712011.

It is an arithmetic number, because the mean of its divisors is an integer number (5550712011).

Almost surely, 2^11101424021 is an apocalyptic number.

It is an amenable number.

11101424021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101424021 is an equidigital number, since it uses as much as digits as its factorization.

11101424021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11101424021 its reverse (12042410111), we get a palindrome (23143834132).

The spelling of 11101424021 in words is "eleven billion, one hundred one million, four hundred twenty-four thousand, twenty-one".