1212321233311 has 4 divisors (see below), whose sum is σ = 1254125413800. Its totient is φ = 1170517052824.

The previous prime is 1212321233303. The next prime is 1212321233327. The reversal of 1212321233311 is 1133321232121.

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 1212321233311 - 2³ = 1212321233303 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 (1212321237311) 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, 20902090201 + ... + 20902090258.

It is an arithmetic number, because the mean of its divisors is an integer number (313531353450).

Almost surely, 2^{1212321233311} is an apocalyptic number.

1212321233311 is a deficient number, since it is larger than the sum of its proper divisors (41804180489).

1212321233311 is an equidigital number, since it uses as much as digits as its factorization.

1212321233311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41804180488.

The product of its digits is 1296, while the sum is 25.

Adding to 1212321233311 its reverse (1133321232121), we get a palindrome (2345642465432).

The spelling of 1212321233311 in words is "one trillion, two hundred twelve billion, three hundred twenty-one million, two hundred thirty-three thousand, three hundred eleven".