11042243121 has 256 divisors, whose sum is σ = 21403533312. Its totient is φ = 4896460800.

The previous prime is 11042243089. The next prime is 11042243131. The reversal of 11042243121 is 12134224011.

It is not a de Polignac number, because 11042243121 - 2⁵ = 11042243089 is a prime.

It is a super-2 number, since 2×11042243121² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (11042243131) 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 in 255 ways as a sum of consecutive naturals, for example, 155524516 + ... + 155524586.

It is an arithmetic number, because the mean of its divisors is an integer number (83607552).

Almost surely, 2^11042243121 is an apocalyptic number.

It is an amenable number.

11042243121 is a deficient number, since it is larger than the sum of its proper divisors (10361290191).

11042243121 is a wasteful number, since it uses less digits than its factorization.

11042243121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 11042243121 its reverse (12134224011), we get a palindrome (23176467132).

The spelling of 11042243121 in words is "eleven billion, forty-two million, two hundred forty-three thousand, one hundred twenty-one".