1212033331211 has 4 divisors (see below), whose sum is σ = 1264730432592. Its totient is φ = 1159336229832.

The previous prime is 1212033331189. The next prime is 1212033331213. The reversal of 1212033331211 is 1121333302121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212033331211 - 2¹⁸ = 1212033069067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 52697101357 = 1212033331211 / (1 + 2 + 1 + 2 + 0 + 3 + 3 + 3 + 3 + 1 + 2 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212033331213) 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 3 ways as a sum of consecutive naturals, for example, 26348550656 + ... + 26348550701.

It is an arithmetic number, because the mean of its divisors is an integer number (316182608148).

Almost surely, 2^{1212033331211} is an apocalyptic number.

1212033331211 is a deficient number, since it is larger than the sum of its proper divisors (52697101381).

1212033331211 is an equidigital number, since it uses as much as digits as its factorization.

1212033331211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52697101380.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1212033331211 its reverse (1121333302121), we get a palindrome (2333366633332).

The spelling of 1212033331211 in words is "one trillion, two hundred twelve billion, thirty-three million, three hundred thirty-one thousand, two hundred eleven".