1221040242224 has 40 divisors (see below), whose sum is σ = 2581054468608. Its totient is φ = 554971106880.

The previous prime is 1221040242221. The next prime is 1221040242263. The reversal of 1221040242224 is 4222420401221.

It is a junction number, because it is equal to n+sod(n) for n = 1221040242193 and 1221040242202.

It is not an unprimeable number, because it can be changed into a prime (1221040242221) 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, 1824329 + ... + 2402135.

Almost surely, 2^{1221040242224} is an apocalyptic number.

It is an amenable number.

1221040242224 is an abundant number, since it is smaller than the sum of its proper divisors (1360014226384).

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

1221040242224 is a wasteful number, since it uses less digits than its factorization.

1221040242224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589833 (or 589827 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 1221040242224 its reverse (4222420401221), we get a palindrome (5443460643445).

The spelling of 1221040242224 in words is "one trillion, two hundred twenty-one billion, forty million, two hundred forty-two thousand, two hundred twenty-four".