1220347512 has 32 divisors (see below), whose sum is σ = 3389854800. Its totient is φ = 406782432.

The previous prime is 1220347507. The next prime is 1220347537. The reversal of 1220347512 is 2157430221.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 2824663 + ... + 2825094.

Almost surely, 2^1220347512 is an apocalyptic number.

1220347512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220347512 is an abundant number, since it is smaller than the sum of its proper divisors (2169507288).

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

1220347512 is a wasteful number, since it uses less digits than its factorization.

1220347512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5649772 (or 5649762 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1220347512 is about 34933.4726587552. The cubic root of 1220347512 is about 1068.6311759555.

Adding to 1220347512 its reverse (2157430221), we get a palindrome (3377777733).

The spelling of 1220347512 in words is "one billion, two hundred twenty million, three hundred forty-seven thousand, five hundred twelve".