1220123512 has 16 divisors (see below), whose sum is σ = 2288853000. Its totient is φ = 609762720.

The previous prime is 1220123491. The next prime is 1220123537. The reversal of 1220123512 is 2153210221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220123512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19539 + ... + 53122.

Almost surely, 2^1220123512 is an apocalyptic number.

It is an amenable number.

1220123512 is a deficient number, since it is larger than the sum of its proper divisors (1068729488).

1220123512 is a wasteful number, since it uses less digits than its factorization.

1220123512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74766 (or 74762 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1220123512 is about 34930.2664175354. The cubic root of 1220123512 is about 1068.5657880151.

Adding to 1220123512 its reverse (2153210221), we get a palindrome (3373333733).

The spelling of 1220123512 in words is "one billion, two hundred twenty million, one hundred twenty-three thousand, five hundred twelve".