11021031200 has 72 divisors (see below), whose sum is σ = 26928315540. Its totient is φ = 4404608000.

The previous prime is 11021031191. The next prime is 11021031227. The reversal of 11021031200 is 213012011.

It can be written as a sum of positive squares in 6 ways, for example, as 45535504 + 10975495696 = 6748^2 + 104764^2 .

It is a super-2 number, since 2×11021031200² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1035506 + ... + 1046094.

Almost surely, 2^11021031200 is an apocalyptic number.

11021031200 is a gapful number since it is divisible by the number (10) 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 11021031200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13464157770).

11021031200 is an abundant number, since it is smaller than the sum of its proper divisors (15907284340).

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

11021031200 is a wasteful number, since it uses less digits than its factorization.

11021031200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11910 (or 11897 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 11021031200 its reverse (213012011), we get a palindrome (11234043211).

The spelling of 11021031200 in words is "eleven billion, twenty-one million, thirty-one thousand, two hundred".