1231202213133 has 4 divisors (see below), whose sum is σ = 1641602950848. Its totient is φ = 820801475420.

The previous prime is 1231202213123. The next prime is 1231202213203. The reversal of 1231202213133 is 3313122021321.

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 1231202213133 - 2⁴ = 1231202213117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231202213123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205200368853 + ... + 205200368858.

It is an arithmetic number, because the mean of its divisors is an integer number (410400737712).

Almost surely, 2^{1231202213133} is an apocalyptic number.

It is an amenable number.

1231202213133 is a deficient number, since it is larger than the sum of its proper divisors (410400737715).

1231202213133 is an equidigital number, since it uses as much as digits as its factorization.

1231202213133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410400737714.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1231202213133 its reverse (3313122021321), we get a palindrome (4544324234454).

The spelling of 1231202213133 in words is "one trillion, two hundred thirty-one billion, two hundred two million, two hundred thirteen thousand, one hundred thirty-three".