12213343155438 has 32 divisors (see below), whose sum is σ = 27141552422400. Its totient is φ = 4070995906968.

The previous prime is 12213343155437. The next prime is 12213343155451. The reversal of 12213343155438 is 83455134331221.

It is a happy number.

12213343155438 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 3 + 34 + 31 + 554 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12213343155393 and 12213343155402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213343155437) 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, 1408468 + ... + 5139111.

It is an arithmetic number, because the mean of its divisors is an integer number (848173513200).

Almost surely, 2^{12213343155438} is an apocalyptic number.

12213343155438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12213343155438 is an abundant number, since it is smaller than the sum of its proper divisors (14928209266962).

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

12213343155438 is a wasteful number, since it uses less digits than its factorization.

12213343155438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6582133 (or 6582127 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

Adding to 12213343155438 its reverse (83455134331221), we get a palindrome (95668477486659).

The spelling of 12213343155438 in words is "twelve trillion, two hundred thirteen billion, three hundred forty-three million, one hundred fifty-five thousand, four hundred thirty-eight".