1305123212411 has 4 divisors (see below), whose sum is σ = 1305125593824. Its totient is φ = 1305120831000.

The previous prime is 1305123212401. The next prime is 1305123212453. The reversal of 1305123212411 is 1142123215031.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305123212411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305123212401) 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, 91886 + ... + 1618236.

It is an arithmetic number, because the mean of its divisors is an integer number (326281398456).

Almost surely, 2^{1305123212411} is an apocalyptic number.

1305123212411 is a deficient number, since it is larger than the sum of its proper divisors (2381413).

1305123212411 is an equidigital number, since it uses as much as digits as its factorization.

1305123212411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381412.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 1305123212411 its reverse (1142123215031), we get a palindrome (2447246427442).

The spelling of 1305123212411 in words is "one trillion, three hundred five billion, one hundred twenty-three million, two hundred twelve thousand, four hundred eleven".