1212120000 has 840 divisors, whose sum is σ = 5487818336. Its totient is φ = 248832000.

The previous prime is 1212119999. The next prime is 1212120011. The reversal of 1212120000 is 212121.

It is a tau number, because it is divible by the number of its divisors (840).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 32759982 + ... + 32760018.

Almost surely, 2^1212120000 is an apocalyptic number.

1212120000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2743909168).

1212120000 is an abundant number, since it is smaller than the sum of its proper divisors (4275698336).

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

1212120000 is a wasteful number, since it uses less digits than its factorization.

1212120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1212120000 is about 34815.5137833696. The cubic root of 1212120000 is about 1066.2242088531.

Adding to 1212120000 its reverse (212121), we get a palindrome (1212332121).

The spelling of 1212120000 in words is "one billion, two hundred twelve million, one hundred twenty thousand".