1212080128 has 112 divisors (see below), whose sum is σ = 2893893120. Its totient is φ = 496336896.

The previous prime is 1212080119. The next prime is 1212080137. The reversal of 1212080128 is 8210802121.

It is an interprime number because it is at equal distance from previous prime (1212080119) and next prime (1212080137).

It is a tau number, because it is divible by the number of its divisors (112).

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, 1318453 + ... + 1319371.

Almost surely, 2^1212080128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212080128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446946560).

1212080128 is an abundant number, since it is smaller than the sum of its proper divisors (1681812992).

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

1212080128 is an frugal number, since it uses more digits than its factorization.

1212080128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 1212080128 is about 34814.9411603696. The cubic root of 1212080128 is about 1066.2125177780.

Adding to 1212080128 its reverse (8210802121), we get a palindrome (9422882249).

The spelling of 1212080128 in words is "one billion, two hundred twelve million, eighty thousand, one hundred twenty-eight".