12212120240 has 40 divisors (see below), whose sum is σ = 28399484400. Its totient is φ = 4883763456.

The previous prime is 12212120209. The next prime is 12212120281. The reversal of 12212120240 is 4202121221.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413486 + ... + 442034.

It is an arithmetic number, because the mean of its divisors is an integer number (709987110).

Almost surely, 2^12212120240 is an apocalyptic number.

12212120240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212120240 is an abundant number, since it is smaller than the sum of its proper divisors (16187364160).

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

12212120240 is a wasteful number, since it uses less digits than its factorization.

12212120240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33909 (or 33903 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12212120240 its reverse (4202121221), we get a palindrome (16414241461).

The spelling of 12212120240 in words is "twelve billion, two hundred twelve million, one hundred twenty thousand, two hundred forty".