11012112421 has 2 divisors, whose sum is σ = 11012112422. Its totient is φ = 11012112420.

The previous prime is 11012112409. The next prime is 11012112443. The reversal of 11012112421 is 12421121011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9450756225 + 1561356196 = 97215^2 + 39514^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012112421 - 2¹⁵ = 11012079653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11012112395 and 11012112404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11012112451) 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, 5506056210 + 5506056211.

It is an arithmetic number, because the mean of its divisors is an integer number (5506056211).

Almost surely, 2^11012112421 is an apocalyptic number.

It is an amenable number.

11012112421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11012112421 is an equidigital number, since it uses as much as digits as its factorization.

11012112421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11012112421 its reverse (12421121011), we get a palindrome (23433233432).

The spelling of 11012112421 in words is "eleven billion, twelve million, one hundred twelve thousand, four hundred twenty-one".