11103142021 has 2 divisors, whose sum is σ = 11103142022. Its totient is φ = 11103142020.

The previous prime is 11103142013. The next prime is 11103142067. The reversal of 11103142021 is 12024130111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11043697921 + 59444100 = 105089^2 + 7710^2 .

It is a cyclic number.

It is not a de Polignac number, because 11103142021 - 2³ = 11103142013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11103141986 and 11103142004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11103142321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5551571010 + 5551571011.

It is an arithmetic number, because the mean of its divisors is an integer number (5551571011).

Almost surely, 2^11103142021 is an apocalyptic number.

It is an amenable number.

11103142021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11103142021 is an equidigital number, since it uses as much as digits as its factorization.

11103142021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11103142021 its reverse (12024130111), we get a palindrome (23127272132).

The spelling of 11103142021 in words is "eleven billion, one hundred three million, one hundred forty-two thousand, twenty-one".