1240221404424 has 32 divisors (see below), whose sum is σ = 3111587526240. Its totient is φ = 411935932800.

The previous prime is 1240221404423. The next prime is 1240221404431. The reversal of 1240221404424 is 4244041220421.

It is a junction number, because it is equal to n+sod(n) for n = 1240221404391 and 1240221404400.

It is not an unprimeable number, because it can be changed into a prime (1240221404423) 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, 91943242 + ... + 91956729.

It is an arithmetic number, because the mean of its divisors is an integer number (97237110195).

Almost surely, 2^{1240221404424} is an apocalyptic number.

It is an amenable number.

1240221404424 is an abundant number, since it is smaller than the sum of its proper divisors (1871366121816).

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

1240221404424 is a wasteful number, since it uses less digits than its factorization.

1240221404424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183900261 (or 183900257 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 30.

Adding to 1240221404424 its reverse (4244041220421), we get a palindrome (5484262624845).

The spelling of 1240221404424 in words is "one trillion, two hundred forty billion, two hundred twenty-one million, four hundred four thousand, four hundred twenty-four".