222001212440 has 64 divisors (see below), whose sum is σ = 578900597760. Its totient is φ = 75042656640.

The previous prime is 222001212401. The next prime is 222001212443. The reversal of 222001212440 is 44212100222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001212443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5563652 + ... + 5603411.

It is an arithmetic number, because the mean of its divisors is an integer number (9045321840).

Almost surely, 2^222001212440 is an apocalyptic number.

222001212440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222001212440 is an abundant number, since it is smaller than the sum of its proper divisors (356899385320).

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

222001212440 is a wasteful number, since it uses less digits than its factorization.

222001212440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11167152 (or 11167148 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222001212440 its reverse (44212100222), we get a palindrome (266213312662).

The spelling of 222001212440 in words is "two hundred twenty-two billion, one million, two hundred twelve thousand, four hundred forty".