1200024440021 has 16 divisors (see below), whose sum is σ = 1341101881728. Its totient is φ = 1064279884800.

The previous prime is 1200024440011. The next prime is 1200024440059. The reversal of 1200024440021 is 1200444200021.

It is a de Polignac number, because none of the positive numbers 2^k-1200024440021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200024439975 and 1200024440002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200024440011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16925381 + ... + 16996133.

It is an arithmetic number, because the mean of its divisors is an integer number (83818867608).

Almost surely, 2^{1200024440021} is an apocalyptic number.

1200024440021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200024440021 is a deficient number, since it is larger than the sum of its proper divisors (141077441707).

1200024440021 is a wasteful number, since it uses less digits than its factorization.

1200024440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108412.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 1200024440021 its reverse (1200444200021), we get a palindrome (2400468640042).

The spelling of 1200024440021 in words is "one trillion, two hundred billion, twenty-four million, four hundred forty thousand, twenty-one".