1212200720 has 40 divisors (see below), whose sum is σ = 2843329176. Its totient is φ = 480585728.

The previous prime is 1212200707. The next prime is 1212200747. The reversal of 1212200720 is 270022121.

It can be written as a sum of positive squares in 4 ways, for example, as 37356544 + 1174844176 = 6112^2 + 34276^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58007 + ... + 76086.

Almost surely, 2^1212200720 is an apocalyptic number.

1212200720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212200720 is an abundant number, since it is smaller than the sum of its proper divisors (1631128456).

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

1212200720 is a wasteful number, since it uses less digits than its factorization.

1212200720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134219 (or 134213 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1212200720 is about 34816.6730173921. The cubic root of 1212200720 is about 1066.2478763964.

Adding to 1212200720 its reverse (270022121), we get a palindrome (1482222841).

The spelling of 1212200720 in words is "one billion, two hundred twelve million, two hundred thousand, seven hundred twenty".