11172221600 has 36 divisors (see below), whose sum is σ = 27274187934. Its totient is φ = 4468888320.

The previous prime is 11172221581. The next prime is 11172221603. The reversal of 11172221600 is 612227111.

It can be written as a sum of positive squares in 3 ways, for example, as 4754929936 + 6417291664 = 68956^2 + 80108^2 .

It is not an unprimeable number, because it can be changed into a prime (11172221603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6981839 + ... + 6983438.

Almost surely, 2^11172221600 is an apocalyptic number.

11172221600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11172221600 is an abundant number, since it is smaller than the sum of its proper divisors (16101966334).

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

11172221600 is a wasteful number, since it uses less digits than its factorization.

11172221600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13965297 (or 13965284 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 11172221600 its reverse (612227111), we get a palindrome (11784448711).

The spelling of 11172221600 in words is "eleven billion, one hundred seventy-two million, two hundred twenty-one thousand, six hundred".