11111241421 has 6 divisors (see below), whose sum is σ = 12925321710. Its totient is φ = 9523921176.

The previous prime is 11111241413. The next prime is 11111241431. The reversal of 11111241421 is 12414211111.

It can be written as a sum of positive squares in only one way, i.e., 6407202025 + 4704039396 = 80045^2 + 68586^2 .

It is not a de Polignac number, because 11111241421 - 2³ = 11111241413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111241431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113379966 + ... + 113380063.

It is an arithmetic number, because the mean of its divisors is an integer number (2154220285).

Almost surely, 2^11111241421 is an apocalyptic number.

It is an amenable number.

11111241421 is a deficient number, since it is larger than the sum of its proper divisors (1814080289).

11111241421 is an equidigital number, since it uses as much as digits as its factorization.

11111241421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226760043 (or 226760036 counting only the distinct ones).

The product of its digits is 64, while the sum is 19.

Adding to 11111241421 its reverse (12414211111), we get a palindrome (23525452532).

The spelling of 11111241421 in words is "eleven billion, one hundred eleven million, two hundred forty-one thousand, four hundred twenty-one".