11031220032 has 224 divisors, whose sum is σ = 37178772480. Its totient is φ = 2810142720.

The previous prime is 11031220001. The next prime is 11031220037. The reversal of 11031220032 is 23002213011.

It is a tau number, because it is divible by the number of its divisors (224).

It is a junction number, because it is equal to n+sod(n) for n = 11031219993 and 11031220020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031220037) 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, 421407 + ... + 446817.

Almost surely, 2^11031220032 is an apocalyptic number.

11031220032 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 11031220032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18589386240).

11031220032 is an abundant number, since it is smaller than the sum of its proper divisors (26147552448).

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

11031220032 is a wasteful number, since it uses less digits than its factorization.

11031220032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25469 (or 25459 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 11031220032 its reverse (23002213011), we get a palindrome (34033433043).

The spelling of 11031220032 in words is "eleven billion, thirty-one million, two hundred twenty thousand, thirty-two".