11012031220 has 12 divisors (see below), whose sum is σ = 23125265604. Its totient is φ = 4404812480.

The previous prime is 11012031187. The next prime is 11012031271. The reversal of 11012031220 is 2213021011.

It can be written as a sum of positive squares in 2 ways, for example, as 5295763984 + 5716267236 = 72772^2 + 75606^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11012031220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275300761 + ... + 275300800.

It is an arithmetic number, because the mean of its divisors is an integer number (1927105467).

Almost surely, 2^11012031220 is an apocalyptic number.

11012031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11012031220 is an abundant number, since it is smaller than the sum of its proper divisors (12113234384).

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

11012031220 is a wasteful number, since it uses less digits than its factorization.

11012031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550601570 (or 550601568 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11012031220 its reverse (2213021011), we get a palindrome (13225052231).

The spelling of 11012031220 in words is "eleven billion, twelve million, thirty-one thousand, two hundred twenty".