1213333212000 has 768 divisors, whose sum is σ = 4913685504000. Its totient is φ = 254874009600.

The previous prime is 1213333211971. The next prime is 1213333212001. The reversal of 1213333212000 is 2123333121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213333212001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 260985676 + ... + 260990324.

It is an arithmetic number, because the mean of its divisors is an integer number (6398028000).

Almost surely, 2^{1213333212000} is an apocalyptic number.

1213333212000 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 1213333212000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2456842752000).

1213333212000 is an abundant number, since it is smaller than the sum of its proper divisors (3700352292000).

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

1213333212000 is a wasteful number, since it uses less digits than its factorization.

1213333212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4936 (or 4918 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1213333212000 its reverse (2123333121), we get a palindrome (1215456545121).

It can be divided in two parts, 121333 and 3212000, that added together give a palindrome (3333333).

The spelling of 1213333212000 in words is "one trillion, two hundred thirteen billion, three hundred thirty-three million, two hundred twelve thousand".