11031143220 has 96 divisors (see below), whose sum is σ = 34732736640. Its totient is φ = 2906184960.

The previous prime is 11031143191. The next prime is 11031143231. The reversal of 11031143220 is 2234113011.

It is a super-2 number, since 2×11031143220² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 11031143193 and 11031143202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78241 + ... + 167880.

It is an arithmetic number, because the mean of its divisors is an integer number (361799340).

Almost surely, 2^11031143220 is an apocalyptic number.

11031143220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11031143220 is an abundant number, since it is smaller than the sum of its proper divisors (23701593420).

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

11031143220 is a wasteful number, since it uses less digits than its factorization.

11031143220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246222 (or 246214 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11031143220 its reverse (2234113011), we get a palindrome (13265256231).

The spelling of 11031143220 in words is "eleven billion, thirty-one million, one hundred forty-three thousand, two hundred twenty".