1243211303112 has 128 divisors (see below), whose sum is σ = 3281752320000. Its totient is φ = 391377401856.

The previous prime is 1243211303069. The next prime is 1243211303123. The reversal of 1243211303112 is 2113031123421.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 403769589 + ... + 403772667.

It is an arithmetic number, because the mean of its divisors is an integer number (25638690000).

Almost surely, 2^{1243211303112} is an apocalyptic number.

1243211303112 is a gapful number since it is divisible by the number (12) 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 1243211303112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1640876160000).

1243211303112 is an abundant number, since it is smaller than the sum of its proper divisors (2038541016888).

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

1243211303112 is a wasteful number, since it uses less digits than its factorization.

1243211303112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5563 (or 5559 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1243211303112 its reverse (2113031123421), we get a palindrome (3356242426533).

The spelling of 1243211303112 in words is "one trillion, two hundred forty-three billion, two hundred eleven million, three hundred three thousand, one hundred twelve".