11042013421 has 2 divisors, whose sum is σ = 11042013422. Its totient is φ = 11042013420.

The previous prime is 11042013401. The next prime is 11042013461. The reversal of 11042013421 is 12431024011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8367675625 + 2674337796 = 91475^2 + 51714^2 .

It is a cyclic number.

It is not a de Polignac number, because 11042013421 - 2⁷ = 11042013293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11042013401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5521006710 + 5521006711.

It is an arithmetic number, because the mean of its divisors is an integer number (5521006711).

Almost surely, 2^11042013421 is an apocalyptic number.

It is an amenable number.

11042013421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11042013421 is an equidigital number, since it uses as much as digits as its factorization.

11042013421 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 11042013421 its reverse (12431024011), we get a palindrome (23473037432).

The spelling of 11042013421 in words is "eleven billion, forty-two million, thirteen thousand, four hundred twenty-one".