12213131225540 has 48 divisors (see below), whose sum is σ = 29405162059392. Its totient is φ = 4173981117696.

The previous prime is 12213131225539. The next prime is 12213131225543. The reversal of 12213131225540 is 4552213131221.

12213131225540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12213131225497 and 12213131225506.

It is not an unprimeable number, because it can be changed into a prime (12213131225543) 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, 139311854 + ... + 139399493.

It is an arithmetic number, because the mean of its divisors is an integer number (612607542904).

Almost surely, 2^{12213131225540} is an apocalyptic number.

12213131225540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12213131225540 is an abundant number, since it is smaller than the sum of its proper divisors (17192030833852).

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

12213131225540 is a wasteful number, since it uses less digits than its factorization.

12213131225540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278711676 (or 278711674 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 12213131225540 its reverse (4552213131221), we get a palindrome (16765344356761).

The spelling of 12213131225540 in words is "twelve trillion, two hundred thirteen billion, one hundred thirty-one million, two hundred twenty-five thousand, five hundred forty".