11111614421 has 2 divisors, whose sum is σ = 11111614422. Its totient is φ = 11111614420.

The previous prime is 11111614399. The next prime is 11111614427. The reversal of 11111614421 is 12441611111.

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., 5992927396 + 5118687025 = 77414^2 + 71545^2 .

It is an emirp because it is prime and its reverse (12441611111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111614421 - 2¹⁸ = 11111352277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111614427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555807210 + 5555807211.

It is an arithmetic number, because the mean of its divisors is an integer number (5555807211).

Almost surely, 2^11111614421 is an apocalyptic number.

It is an amenable number.

11111614421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111614421 is an equidigital number, since it uses as much as digits as its factorization.

11111614421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 23.

The spelling of 11111614421 in words is "eleven billion, one hundred eleven million, six hundred fourteen thousand, four hundred twenty-one".