11011220400 has 60 divisors (see below), whose sum is σ = 35272613192. Its totient is φ = 2936325120.

The previous prime is 11011220377. The next prime is 11011220411. The reversal of 11011220400 is 402211011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 4586809 + ... + 4589208.

Almost surely, 2^11011220400 is an apocalyptic number.

11011220400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011220400 is an abundant number, since it is smaller than the sum of its proper divisors (24261392792).

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

11011220400 is a wasteful number, since it uses less digits than its factorization.

11011220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9176038 (or 9176027 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11011220400 its reverse (402211011), we get a palindrome (11413431411).

The spelling of 11011220400 in words is "eleven billion, eleven million, two hundred twenty thousand, four hundred".