11404006421 has 2 divisors, whose sum is σ = 11404006422. Its totient is φ = 11404006420.

The previous prime is 11404006391. The next prime is 11404006423. The reversal of 11404006421 is 12460040411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9870422500 + 1533583921 = 99350^2 + 39161^2 .

It is a cyclic number.

It is not a de Polignac number, because 11404006421 - 2¹⁸ = 11403744277 is a prime.

Together with 11404006423, 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 (11404006423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5702003210 + 5702003211.

It is an arithmetic number, because the mean of its divisors is an integer number (5702003211).

Almost surely, 2^11404006421 is an apocalyptic number.

It is an amenable number.

11404006421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11404006421 is an equidigital number, since it uses as much as digits as its factorization.

11404006421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 11404006421 its reverse (12460040411), we get a palindrome (23864046832).

The spelling of 11404006421 in words is "eleven billion, four hundred four million, six thousand, four hundred twenty-one".