11051113421 has 2 divisors, whose sum is σ = 11051113422. Its totient is φ = 11051113420.

The previous prime is 11051113379. The next prime is 11051113427. The reversal of 11051113421 is 12431115011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10361000521 + 690112900 = 101789^2 + 26270^2 .

It is a cyclic number.

It is not a de Polignac number, because 11051113421 - 2¹⁴ = 11051097037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11051113393 and 11051113402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11051113427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5525556710 + 5525556711.

It is an arithmetic number, because the mean of its divisors is an integer number (5525556711).

Almost surely, 2^11051113421 is an apocalyptic number.

It is an amenable number.

11051113421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11051113421 is an equidigital number, since it uses as much as digits as its factorization.

11051113421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 11051113421 its reverse (12431115011), we get a palindrome (23482228432).

The spelling of 11051113421 in words is "eleven billion, fifty-one million, one hundred thirteen thousand, four hundred twenty-one".