1213231340244 has 96 divisors (see below), whose sum is σ = 3531873945600. Its totient is φ = 314904159360.

The previous prime is 1213231340227. The next prime is 1213231340249. The reversal of 1213231340244 is 4420431323121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213231340249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 860977 + ... + 1779815.

It is an arithmetic number, because the mean of its divisors is an integer number (36790353600).

Almost surely, 2^{1213231340244} is an apocalyptic number.

1213231340244 is a gapful number since it is divisible by the number (14) 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 1213231340244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1765936972800).

1213231340244 is an abundant number, since it is smaller than the sum of its proper divisors (2318642605356).

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

1213231340244 is a wasteful number, since it uses less digits than its factorization.

1213231340244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920293 (or 920291 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 1213231340244 its reverse (4420431323121), we get a palindrome (5633662663365).

The spelling of 1213231340244 in words is "one trillion, two hundred thirteen billion, two hundred thirty-one million, three hundred forty thousand, two hundred forty-four".