1212323120000 has 160 divisors (see below), whose sum is σ = 3176848864200. Its totient is φ = 459406080000.

The previous prime is 1212323119937. The next prime is 1212323120009. The reversal of 1212323120000 is 213232121.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212323120009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1121210 + ... + 1918790.

Almost surely, 2^{1212323120000} is an apocalyptic number.

1212323120000 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 1212323120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1588424432100).

1212323120000 is an abundant number, since it is smaller than the sum of its proper divisors (1964525744200).

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

1212323120000 is an frugal number, since it uses more digits than its factorization.

1212323120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797634 (or 797607 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1212323120000 its reverse (213232121), we get a palindrome (1212536352121).

The spelling of 1212323120000 in words is "one trillion, two hundred twelve billion, three hundred twenty-three million, one hundred twenty thousand".