11122121232 has 160 divisors (see below), whose sum is σ = 32752546560. Its totient is φ = 3612211200.

The previous prime is 11122121221. The next prime is 11122121237. The reversal of 11122121232 is 23212122111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (11122121237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3455688 + ... + 3458904.

It is an arithmetic number, because the mean of its divisors is an integer number (204703416).

Almost surely, 2^11122121232 is an apocalyptic number.

11122121232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11122121232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16376273280).

11122121232 is an abundant number, since it is smaller than the sum of its proper divisors (21630425328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11122121232 is a wasteful number, since it uses less digits than its factorization.

11122121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438 (or 3426 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 11122121232 its reverse (23212122111), we get a palindrome (34334243343).

The spelling of 11122121232 in words is "eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred thirty-two".