11122142021 has 4 divisors (see below), whose sum is σ = 11422740492. Its totient is φ = 10821543552.

The previous prime is 11122142011. The next prime is 11122142027. The reversal of 11122142021 is 12024122111.

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 9261945121 + 1860196900 = 96239^2 + 43130^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122142021 - 2¹⁸ = 11121879877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122142027) 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, 150299180 + ... + 150299253.

It is an arithmetic number, because the mean of its divisors is an integer number (2855685123).

Almost surely, 2^11122142021 is an apocalyptic number.

It is an amenable number.

11122142021 is a deficient number, since it is larger than the sum of its proper divisors (300598471).

11122142021 is an equidigital number, since it uses as much as digits as its factorization.

11122142021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300598470.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11122142021 its reverse (12024122111), we get a palindrome (23146264132).

The spelling of 11122142021 in words is "eleven billion, one hundred twenty-two million, one hundred forty-two thousand, twenty-one".