1021240004440 has 32 divisors (see below), whose sum is σ = 2298042424080. Its totient is φ = 408451128192.

The previous prime is 1021240004371. The next prime is 1021240004453. The reversal of 1021240004440 is 444000421201.

It is a super-2 number, since 2×1021240004440² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1032414 + ... + 1763053.

Almost surely, 2^{1021240004440} is an apocalyptic number.

1021240004440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021240004440 is an abundant number, since it is smaller than the sum of its proper divisors (1276802419640).

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

1021240004440 is a wasteful number, since it uses less digits than its factorization.

1021240004440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804611 (or 2804607 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 1021240004440 its reverse (444000421201), we get a palindrome (1465240425641).

The spelling of 1021240004440 in words is "one trillion, twenty-one billion, two hundred forty million, four thousand, four hundred forty".