12221211240 has 96 divisors (see below), whose sum is σ = 45393079680. Its totient is φ = 2793419136.

The previous prime is 12221211227. The next prime is 12221211281. The reversal of 12221211240 is 4211212221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2422324 + ... + 2427363.

It is an arithmetic number, because the mean of its divisors is an integer number (472844580).

Almost surely, 2^12221211240 is an apocalyptic number.

12221211240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221211240 is an abundant number, since it is smaller than the sum of its proper divisors (33171868440).

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

12221211240 is a wasteful number, since it uses less digits than its factorization.

12221211240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4849711 (or 4849704 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12221211240 its reverse (4211212221), we get a palindrome (16432423461).

The spelling of 12221211240 in words is "twelve billion, two hundred twenty-one million, two hundred eleven thousand, two hundred forty".