1211213433141 has 40 divisors (see below), whose sum is σ = 1861381064664. Its totient is φ = 784325928960.

The previous prime is 1211213433083. The next prime is 1211213433149. The reversal of 1211213433141 is 1413343121121.

1211213433141 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 2 + 1 + 343 + 314 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 470445092100 + 740768341041 = 685890^2 + 860679^2 .

It is not a de Polignac number, because 1211213433141 - 2⁷ = 1211213433013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211213433149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1436461 + ... + 2117981.

Almost surely, 2^{1211213433141} is an apocalyptic number.

It is an amenable number.

1211213433141 is a deficient number, since it is larger than the sum of its proper divisors (650167631523).

1211213433141 is an equidigital number, since it uses as much as digits as its factorization.

1211213433141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682163 (or 682154 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

Adding to 1211213433141 its reverse (1413343121121), we get a palindrome (2624556554262).

The spelling of 1211213433141 in words is "one trillion, two hundred eleven billion, two hundred thirteen million, four hundred thirty-three thousand, one hundred forty-one".