1232121113345 has 4 divisors (see below), whose sum is σ = 1478545336020. Its totient is φ = 985696890672.

The previous prime is 1232121113323. The next prime is 1232121113351. The reversal of 1232121113345 is 5433111212321.

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 878313849856 + 353807263489 = 937184^2 + 594817^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232121113345 - 2²⁸ = 1231852677889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123212111330 + ... + 123212111339.

It is an arithmetic number, because the mean of its divisors is an integer number (369636334005).

Almost surely, 2^{1232121113345} is an apocalyptic number.

It is an amenable number.

1232121113345 is a deficient number, since it is larger than the sum of its proper divisors (246424222675).

1232121113345 is an equidigital number, since it uses as much as digits as its factorization.

1232121113345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246424222674.

The product of its digits is 4320, while the sum is 29.

Adding to 1232121113345 its reverse (5433111212321), we get a palindrome (6665232325666).

The spelling of 1232121113345 in words is "one trillion, two hundred thirty-two billion, one hundred twenty-one million, one hundred thirteen thousand, three hundred forty-five".