1213331100212 has 72 divisors (see below), whose sum is σ = 2695878228960. Its totient is φ = 472491714240.

The previous prime is 1213331100167. The next prime is 1213331100221. The reversal of 1213331100212 is 2120011333121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4235843 + ... + 4513205.

It is an arithmetic number, because the mean of its divisors is an integer number (37442753180).

Almost surely, 2^{1213331100212} 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 1213331100212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347939114480).

1213331100212 is an abundant number, since it is smaller than the sum of its proper divisors (1482547128748).

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

1213331100212 is a wasteful number, since it uses less digits than its factorization.

1213331100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279421 (or 279412 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1213331100212 its reverse (2120011333121), we get a palindrome (3333342433333).

The spelling of 1213331100212 in words is "one trillion, two hundred thirteen billion, three hundred thirty-one million, one hundred thousand, two hundred twelve".