1213123333133 has 4 divisors (see below), whose sum is σ = 1213426088160. Its totient is φ = 1212820578108.

The previous prime is 1213123333073. The next prime is 1213123333141. The reversal of 1213123333133 is 3313333213121.

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 1213123333133 - 2⁸ = 1213123332877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213123333096 and 1213123333105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213123333333) 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, 151371503 + ... + 151379516.

It is an arithmetic number, because the mean of its divisors is an integer number (303356522040).

Almost surely, 2^{1213123333133} is an apocalyptic number.

It is an amenable number.

1213123333133 is a deficient number, since it is larger than the sum of its proper divisors (302755027).

1213123333133 is an equidigital number, since it uses as much as digits as its factorization.

1213123333133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302755026.

The product of its digits is 8748, while the sum is 29.

Adding to 1213123333133 its reverse (3313333213121), we get a palindrome (4526456546254).

The spelling of 1213123333133 in words is "one trillion, two hundred thirteen billion, one hundred twenty-three million, three hundred thirty-three thousand, one hundred thirty-three".