1211212324240 has 40 divisors (see below), whose sum is σ = 2816135470080. Its totient is φ = 484473434496.

The previous prime is 1211212324237. The next prime is 1211212324247. The reversal of 1211212324240 is 424232121121.

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

It is not an unprimeable number, because it can be changed into a prime (1211212324247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3746131 + ... + 4056589.

It is an arithmetic number, because the mean of its divisors is an integer number (70403386752).

Almost surely, 2^{1211212324240} is an apocalyptic number.

1211212324240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211212324240 is an abundant number, since it is smaller than the sum of its proper divisors (1604923145840).

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

1211212324240 is a wasteful number, since it uses less digits than its factorization.

1211212324240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359239 (or 359233 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 1211212324240 its reverse (424232121121), we get a palindrome (1635444445361).

The spelling of 1211212324240 in words is "one trillion, two hundred eleven billion, two hundred twelve million, three hundred twenty-four thousand, two hundred forty".