11110121001 has 64 divisors (see below), whose sum is σ = 19718307840. Its totient is φ = 6049572480.

The previous prime is 11110120999. The next prime is 11110121021. The reversal of 11110121001 is 10012101111.

It is not a de Polignac number, because 11110121001 - 2¹ = 11110120999 is a prime.

It is a super-2 number, since 2×11110121001² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (11110121021) 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 63 ways as a sum of consecutive naturals, for example, 316536 + ... + 349878.

It is an arithmetic number, because the mean of its divisors is an integer number (308098560).

Almost surely, 2^11110121001 is an apocalyptic number.

It is an amenable number.

11110121001 is a deficient number, since it is larger than the sum of its proper divisors (8608186839).

11110121001 is a wasteful number, since it uses less digits than its factorization.

11110121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33443 (or 33437 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11110121001 its reverse (10012101111), we get a palindrome (21122222112).

The spelling of 11110121001 in words is "eleven billion, one hundred ten million, one hundred twenty-one thousand, one".