1231013220133 has 4 divisors (see below), whose sum is σ = 1231017641568. Its totient is φ = 1231008798700.

The previous prime is 1231013220131. The next prime is 1231013220169. The reversal of 1231013220133 is 3310223101321.

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 1231013220133 - 2¹ = 1231013220131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231013220131) 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, 1762843 + ... + 2360008.

It is an arithmetic number, because the mean of its divisors is an integer number (307754410392).

Almost surely, 2^{1231013220133} is an apocalyptic number.

It is an amenable number.

1231013220133 is a deficient number, since it is larger than the sum of its proper divisors (4421435).

1231013220133 is an equidigital number, since it uses as much as digits as its factorization.

1231013220133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4421434.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1231013220133 its reverse (3310223101321), we get a palindrome (4541236321454).

The spelling of 1231013220133 in words is "one trillion, two hundred thirty-one billion, thirteen million, two hundred twenty thousand, one hundred thirty-three".