1201222120 has 32 divisors (see below), whose sum is σ = 3088857600. Its totient is φ = 411847488.

The previous prime is 1201222117. The next prime is 1201222129. The reversal of 1201222120 is 212221021.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201222120.

It is not an unprimeable number, because it can be changed into a prime (1201222129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2144760 + ... + 2145319.

It is an arithmetic number, because the mean of its divisors is an integer number (96526800).

Almost surely, 2^1201222120 is an apocalyptic number.

1201222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201222120 is an abundant number, since it is smaller than the sum of its proper divisors (1887635480).

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

1201222120 is a wasteful number, since it uses less digits than its factorization.

1201222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290097 (or 4290093 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1201222120 is about 34658.6514452020. The cubic root of 1201222120 is about 1063.0191957552.

Adding to 1201222120 its reverse (212221021), we get a palindrome (1413443141).

The spelling of 1201222120 in words is "one billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty".