1233001312121 has 4 divisors (see below), whose sum is σ = 1233436543092. Its totient is φ = 1232566081152.

The previous prime is 1233001312111. The next prime is 1233001312129. The reversal of 1233001312121 is 1212131003321.

It is a happy number.

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 902859135721 + 330142176400 = 950189^2 + 574580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233001312121 - 2¹⁸ = 1233001049977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1233001312093 and 1233001312102.

It is not an unprimeable number, because it can be changed into a prime (1233001312129) 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, 217611236 + ... + 217616901.

It is an arithmetic number, because the mean of its divisors is an integer number (308359135773).

Almost surely, 2^{1233001312121} is an apocalyptic number.

It is an amenable number.

1233001312121 is a deficient number, since it is larger than the sum of its proper divisors (435230971).

1233001312121 is an equidigital number, since it uses as much as digits as its factorization.

1233001312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435230970.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1233001312121 its reverse (1212131003321), we get a palindrome (2445132315442).

The spelling of 1233001312121 in words is "one trillion, two hundred thirty-three billion, one million, three hundred twelve thousand, one hundred twenty-one".