1305423066121 has 4 divisors (see below), whose sum is σ = 1313431796752. Its totient is φ = 1297414335492.

The previous prime is 1305423066107. The next prime is 1305423066127. The reversal of 1305423066121 is 1216603245031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1305423066121 - 2¹³ = 1305423057929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305423066127) 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, 4004365071 + ... + 4004365396.

It is an arithmetic number, because the mean of its divisors is an integer number (328357949188).

Almost surely, 2^{1305423066121} is an apocalyptic number.

It is an amenable number.

1305423066121 is a deficient number, since it is larger than the sum of its proper divisors (8008730631).

1305423066121 is an equidigital number, since it uses as much as digits as its factorization.

1305423066121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8008730630.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 1305423066121 in words is "one trillion, three hundred five billion, four hundred twenty-three million, sixty-six thousand, one hundred twenty-one".