1216234120 has 32 divisors (see below), whose sum is σ = 2738473920. Its totient is φ = 486147520.

The previous prime is 1216234091. The next prime is 1216234121. The reversal of 1216234120 is 214326121.

It is a super-3 number, since 3×1216234120³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1216234091 and 1216234100.

It is not an unprimeable number, because it can be changed into a prime (1216234121) 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, 50379 + ... + 70501.

It is an arithmetic number, because the mean of its divisors is an integer number (85577310).

Almost surely, 2^1216234120 is an apocalyptic number.

1216234120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216234120 is an abundant number, since it is smaller than the sum of its proper divisors (1522239800).

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

1216234120 is a wasteful number, since it uses less digits than its factorization.

1216234120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21645 (or 21641 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1216234120 is about 34874.5483124871. The cubic root of 1216234120 is about 1067.4291557722.

The spelling of 1216234120 in words is "one billion, two hundred sixteen million, two hundred thirty-four thousand, one hundred twenty".