12212227040 has 96 divisors (see below), whose sum is σ = 31793531616. Its totient is φ = 4404234240.

The previous prime is 12212227031. The next prime is 12212227073. The reversal of 12212227040 is 4072221221.

It is a junction number, because it is equal to n+sod(n) for n = 12212226997 and 12212227015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21170 + ... + 157710.

It is an arithmetic number, because the mean of its divisors is an integer number (331182621).

Almost surely, 2^12212227040 is an apocalyptic number.

12212227040 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 12212227040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15896765808).

12212227040 is an abundant number, since it is smaller than the sum of its proper divisors (19581304576).

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

12212227040 is a wasteful number, since it uses less digits than its factorization.

12212227040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136612 (or 136604 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

Adding to 12212227040 its reverse (4072221221), we get a palindrome (16284448261).

The spelling of 12212227040 in words is "twelve billion, two hundred twelve million, two hundred twenty-seven thousand, forty".