1212321230111 has 4 divisors (see below), whose sum is σ = 1212329114352. Its totient is φ = 1212313345872.

The previous prime is 1212321230059. The next prime is 1212321230119. The reversal of 1212321230111 is 1110321232121.

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 1212321230111 - 2¹⁰ = 1212321229087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212321230119) 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, 3706790 + ... + 4020563.

It is an arithmetic number, because the mean of its divisors is an integer number (303082278588).

Almost surely, 2^{1212321230111} is an apocalyptic number.

1212321230111 is a deficient number, since it is larger than the sum of its proper divisors (7884241).

1212321230111 is an equidigital number, since it uses as much as digits as its factorization.

1212321230111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7884240.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1212321230111 its reverse (1110321232121), we get a palindrome (2322642462232).

The spelling of 1212321230111 in words is "one trillion, two hundred twelve billion, three hundred twenty-one million, two hundred thirty thousand, one hundred eleven".