1211213311443 has 12 divisors (see below), whose sum is σ = 1779183396120. Its totient is φ = 793789514496.

The previous prime is 1211213311409. The next prime is 1211213311499. The reversal of 1211213311443 is 3441133121121.

1211213311443 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 213 + 3 + 1 + 1 + 443 = 666.

It is not a de Polignac number, because 1211213311443 - 2⁶ = 1211213311379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211213310443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1140501646 + ... + 1140502707.

It is an arithmetic number, because the mean of its divisors is an integer number (148265283010).

Almost surely, 2^{1211213311443} is an apocalyptic number.

1211213311443 is a deficient number, since it is larger than the sum of its proper divisors (567970084677).

1211213311443 is a wasteful number, since it uses less digits than its factorization.

1211213311443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281004418 (or 2281004415 counting only the distinct ones).

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

Adding to 1211213311443 its reverse (3441133121121), we get a palindrome (4652346432564).

The spelling of 1211213311443 in words is "one trillion, two hundred eleven billion, two hundred thirteen million, three hundred eleven thousand, four hundred forty-three".