11125011421 has 4 divisors (see below), whose sum is σ = 11129003100. Its totient is φ = 11121019744.

The previous prime is 11125011409. The next prime is 11125011439. The reversal of 11125011421 is 12411052111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4179622500 + 6945388921 = 64650^2 + 83339^2 .

It is a cyclic number.

It is not a de Polignac number, because 11125011421 - 2²¹ = 11122914269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11125011721) 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 in 3 ways as a sum of consecutive naturals, for example, 1991656 + ... + 1997233.

It is an arithmetic number, because the mean of its divisors is an integer number (2782250775).

Almost surely, 2^11125011421 is an apocalyptic number.

It is an amenable number.

11125011421 is a deficient number, since it is larger than the sum of its proper divisors (3991679).

11125011421 is an equidigital number, since it uses as much as digits as its factorization.

11125011421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991678.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 11125011421 its reverse (12411052111), we get a palindrome (23536063532).

The spelling of 11125011421 in words is "eleven billion, one hundred twenty-five million, eleven thousand, four hundred twenty-one".