1222311200 has 72 divisors (see below), whose sum is σ = 3255260400. Its totient is φ = 444473600.

The previous prime is 1222311193. The next prime is 1222311239. The reversal of 1222311200 is 21132221.

It is a happy number.

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, 60650 + ... + 78249.

It is an arithmetic number, because the mean of its divisors is an integer number (45211950).

Almost surely, 2^1222311200 is an apocalyptic number.

1222311200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222311200 is an abundant number, since it is smaller than the sum of its proper divisors (2032949200).

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

1222311200 is a wasteful number, since it uses less digits than its factorization.

1222311200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138930 (or 138917 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1222311200 is about 34961.5674705812. The cubic root of 1222311200 is about 1069.2040547578.

Adding to 1222311200 its reverse (21132221), we get a palindrome (1243443421).

The spelling of 1222311200 in words is "one billion, two hundred twenty-two million, three hundred eleven thousand, two hundred".