1213333221131 has 4 divisors (see below), whose sum is σ = 1214078971512. Its totient is φ = 1212587470752.

The previous prime is 1213333221119. The next prime is 1213333221167. The reversal of 1213333221131 is 1311223333121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213333221131 is a prime.

It is a super-2 number, since 2×1213333221131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213333221131.

It is not an unprimeable number, because it can be changed into a prime (1213333221431) 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, 372872750 + ... + 372876003.

It is an arithmetic number, because the mean of its divisors is an integer number (303519742878).

Almost surely, 2^{1213333221131} is an apocalyptic number.

1213333221131 is a deficient number, since it is larger than the sum of its proper divisors (745750381).

1213333221131 is an equidigital number, since it uses as much as digits as its factorization.

1213333221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745750380.

The product of its digits is 1944, while the sum is 26.

Adding to 1213333221131 its reverse (1311223333121), we get a palindrome (2524556554252).

The spelling of 1213333221131 in words is "one trillion, two hundred thirteen billion, three hundred thirty-three million, two hundred twenty-one thousand, one hundred thirty-one".