1212210321331 has 4 divisors (see below), whose sum is σ = 1219647194632. Its totient is φ = 1204773448032.

The previous prime is 1212210321323. The next prime is 1212210321349. The reversal of 1212210321331 is 1331230122121.

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 1212210321331 - 2³ = 1212210321323 is a prime.

It is a super-2 number, since 2×1212210321331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212210325331) 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, 3718436406 + ... + 3718436731.

It is an arithmetic number, because the mean of its divisors is an integer number (304911798658).

Almost surely, 2^{1212210321331} is an apocalyptic number.

1212210321331 is a deficient number, since it is larger than the sum of its proper divisors (7436873301).

1212210321331 is an equidigital number, since it uses as much as digits as its factorization.

1212210321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7436873300.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1212210321331 its reverse (1331230122121), we get a palindrome (2543440443452).

The spelling of 1212210321331 in words is "one trillion, two hundred twelve billion, two hundred ten million, three hundred twenty-one thousand, three hundred thirty-one".