1213003312312 has 64 divisors (see below), whose sum is σ = 2502409321440. Its totient is φ = 546649497600.

The previous prime is 1213003312307. The next prime is 1213003312321. The reversal of 1213003312312 is 2132133003121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9545512 + ... + 9671752.

Almost surely, 2^{1213003312312} 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 1213003312312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251204660720).

1213003312312 is an abundant number, since it is smaller than the sum of its proper divisors (1289406009128).

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

1213003312312 is a wasteful number, since it uses less digits than its factorization.

1213003312312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127192 (or 127188 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1213003312312 its reverse (2132133003121), we get a palindrome (3345136315433).

The spelling of 1213003312312 in words is "one trillion, two hundred thirteen billion, three million, three hundred twelve thousand, three hundred twelve".