1212921984000 has 1408 divisors, whose sum is σ = 4552396992000. Its totient is φ = 285160243200.

The previous prime is 1212921983993. The next prime is 1212921984019. The reversal of 1212921984000 is 4891292121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212921984000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8140415926 + ... + 8140416074.

It is an arithmetic number, because the mean of its divisors is an integer number (3233236500).

Almost surely, 2^{1212921984000} is an apocalyptic number.

1212921984000 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 1212921984000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2276198496000).

1212921984000 is an abundant number, since it is smaller than the sum of its proper divisors (3339475008000).

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

1212921984000 is a wasteful number, since it uses less digits than its factorization.

1212921984000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The spelling of 1212921984000 in words is "one trillion, two hundred twelve billion, nine hundred twenty-one million, nine hundred eighty-four thousand".