1226731201136 has 80 divisors (see below), whose sum is σ = 2790207218880. Its totient is φ = 511448463360.

The previous prime is 1226731201097. The next prime is 1226731201153. The reversal of 1226731201136 is 6311021376221.

It is a junction number, because it is equal to n+sod(n) for n = 1226731201096 and 1226731201105.

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, 29438876 + ... + 29480516.

It is an arithmetic number, because the mean of its divisors is an integer number (34877590236).

Almost surely, 2^{1226731201136} is an apocalyptic number.

1226731201136 is a gapful number since it is divisible by the number (16) 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 1226731201136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1395103609440).

1226731201136 is an abundant number, since it is smaller than the sum of its proper divisors (1563476017744).

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

1226731201136 is a wasteful number, since it uses less digits than its factorization.

1226731201136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48802 (or 48796 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

Adding to 1226731201136 its reverse (6311021376221), we get a palindrome (7537752577357).

The spelling of 1226731201136 in words is "one trillion, two hundred twenty-six billion, seven hundred thirty-one million, two hundred one thousand, one hundred thirty-six".