1223231413240 has 64 divisors (see below), whose sum is σ = 2849325724800. Its totient is φ = 472063807488.

The previous prime is 1223231413199. The next prime is 1223231413241. The reversal of 1223231413240 is 423141323221.

It is a junction number, because it is equal to n+sod(n) for n = 1223231413199 and 1223231413208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223231413241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1141992 + ... + 1936648.

It is an arithmetic number, because the mean of its divisors is an integer number (44520714450).

Almost surely, 2^{1223231413240} is an apocalyptic number.

1223231413240 is a gapful number since it is divisible by the number (10) 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 1223231413240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1424662862400).

1223231413240 is an abundant number, since it is smaller than the sum of its proper divisors (1626094311560).

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

1223231413240 is a wasteful number, since it uses less digits than its factorization.

1223231413240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796024 (or 796020 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1223231413240 its reverse (423141323221), we get a palindrome (1646372736461).

The spelling of 1223231413240 in words is "one trillion, two hundred twenty-three billion, two hundred thirty-one million, four hundred thirteen thousand, two hundred forty".