1204342440021 has 12 divisors (see below), whose sum is σ = 1988120853472. Its totient is φ = 688195679976.

The previous prime is 1204342439977. The next prime is 1204342440073. The reversal of 1204342440021 is 1200442434021.

1204342440021 is a `hidden beast` number, since 1 + 204 + 34 + 2 + 4 + 400 + 21 = 666.

It is not a de Polignac number, because 1204342440021 - 2²² = 1204338245717 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 (1204342440121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9558273271 + ... + 9558273396.

Almost surely, 2^{1204342440021} is an apocalyptic number.

It is an amenable number.

1204342440021 is a deficient number, since it is larger than the sum of its proper divisors (783778413451).

1204342440021 is a wasteful number, since it uses less digits than its factorization.

1204342440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19116546680 (or 19116546677 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 1204342440021 its reverse (1200442434021), we get a palindrome (2404784874042).

The spelling of 1204342440021 in words is "one trillion, two hundred four billion, three hundred forty-two million, four hundred forty thousand, twenty-one".