1204340434021 has 4 divisors (see below), whose sum is σ = 1217872349100. Its totient is φ = 1190808518944.

The previous prime is 1204340433979. The next prime is 1204340434043.

1204340434021 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70198502500 + 1134141931521 = 264950^2 + 1064961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1204340434021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204340434061) 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, 6765957406 + ... + 6765957583.

It is an arithmetic number, because the mean of its divisors is an integer number (304468087275).

Almost surely, 2^{1204340434021} is an apocalyptic number.

It is an amenable number.

1204340434021 is a deficient number, since it is larger than the sum of its proper divisors (13531915079).

1204340434021 is an equidigital number, since it uses as much as digits as its factorization.

1204340434021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13531915078.

The product of its (nonzero) digits is 9216, while the sum is 28.

It can be divided in two parts, 1204340 and 434021, that added together give a palindrome (1638361).

The spelling of 1204340434021 in words is "one trillion, two hundred four billion, three hundred forty million, four hundred thirty-four thousand, twenty-one".