1244224404021 has 8 divisors (see below), whose sum is σ = 1659049203904. Its totient is φ = 829441270080.

The previous prime is 1244224404019. The next prime is 1244224404029. The reversal of 1244224404021 is 1204044224421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1244224404021 - 2¹ = 1244224404019 is a prime.

It is a super-2 number, since 2×1244224404021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1244224404021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244224404029) 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, 10346740 + ... + 10466301.

It is an arithmetic number, because the mean of its divisors is an integer number (207381150488).

Almost surely, 2^{1244224404021} is an apocalyptic number.

It is an amenable number.

1244224404021 is a deficient number, since it is larger than the sum of its proper divisors (414824799883).

1244224404021 is a wasteful number, since it uses less digits than its factorization.

1244224404021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20832971.

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

Adding to 1244224404021 its reverse (1204044224421), we get a palindrome (2448268628442).

The spelling of 1244224404021 in words is "one trillion, two hundred forty-four billion, two hundred twenty-four million, four hundred four thousand, twenty-one".