1204343400123 has 12 divisors (see below), whose sum is σ = 1841936965128. Its totient is φ = 755666447040.

The previous prime is 1204343400103. The next prime is 1204343400137. The reversal of 1204343400123 is 3210043434021.

1204343400123 is a `hidden beast` number, since 1 + 204 + 3 + 43 + 400 + 12 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1204343400123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1204343400103) 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, 3935762593 + ... + 3935762898.

It is an arithmetic number, because the mean of its divisors is an integer number (153494747094).

Almost surely, 2^{1204343400123} is an apocalyptic number.

1204343400123 is a deficient number, since it is larger than the sum of its proper divisors (637593565005).

1204343400123 is a wasteful number, since it uses less digits than its factorization.

1204343400123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7871525514 (or 7871525511 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 1204343400123 its reverse (3210043434021), we get a palindrome (4414386834144).

The spelling of 1204343400123 in words is "one trillion, two hundred four billion, three hundred forty-three million, four hundred thousand, one hundred twenty-three".