1220412120 has 32 divisors (see below), whose sum is σ = 3661236720. Its totient is φ = 325443200.

The previous prime is 1220412101. The next prime is 1220412121. The reversal of 1220412120 is 212140221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1220412120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220412121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5084931 + ... + 5085170.

Almost surely, 2^1220412120 is an apocalyptic number.

1220412120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220412120 is an abundant number, since it is smaller than the sum of its proper divisors (2440824600).

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

1220412120 is a wasteful number, since it uses less digits than its factorization.

1220412120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10170115 (or 10170111 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1220412120 is about 34934.3973756526. The cubic root of 1220412120 is about 1068.6500342189.

Adding to 1220412120 its reverse (212140221), we get a palindrome (1432552341).

The spelling of 1220412120 in words is "one billion, two hundred twenty million, four hundred twelve thousand, one hundred twenty".