1021240004441 has 4 divisors (see below), whose sum is σ = 1022278906752. Its totient is φ = 1020201102132.

The previous prime is 1021240004371. The next prime is 1021240004453. The reversal of 1021240004441 is 1444000421201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021240004441 - 2¹⁴ = 1021239988057 is a prime.

It is a super-2 number, since 2×1021240004441² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021240004341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519449681 + ... + 519451646.

It is an arithmetic number, because the mean of its divisors is an integer number (255569726688).

Almost surely, 2^{1021240004441} is an apocalyptic number.

It is an amenable number.

1021240004441 is a deficient number, since it is larger than the sum of its proper divisors (1038902311).

1021240004441 is an equidigital number, since it uses as much as digits as its factorization.

1021240004441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038902310.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 1021240004441 its reverse (1444000421201), we get a palindrome (2465240425642).

The spelling of 1021240004441 in words is "one trillion, twenty-one billion, two hundred forty million, four thousand, four hundred forty-one".