11311221300 has 36 divisors (see below), whose sum is σ = 32727134496. Its totient is φ = 3016325600.

The previous prime is 11311221287. The next prime is 11311221307. The reversal of 11311221300 is 312211311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11311221300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311221307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18851736 + ... + 18852335.

Almost surely, 2^11311221300 is an apocalyptic number.

11311221300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311221300 is an abundant number, since it is smaller than the sum of its proper divisors (21415913196).

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

11311221300 is a wasteful number, since it uses less digits than its factorization.

11311221300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37704088 (or 37704081 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11311221300 its reverse (312211311), we get a palindrome (11623432611).

The spelling of 11311221300 in words is "eleven billion, three hundred eleven million, two hundred twenty-one thousand, three hundred".