1212321222031 has 2 divisors, whose sum is σ = 1212321222032. Its totient is φ = 1212321222030.

The previous prime is 1212321222029. The next prime is 1212321222043. The reversal of 1212321222031 is 1302221232121.

It is a weak prime.

It is an emirp because it is prime and its reverse (1302221232121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212321222031 - 2¹ = 1212321222029 is a prime.

It is a super-2 number, since 2×1212321222031² (a number of 25 digits) contains 22 as substring.

Together with 1212321222029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1212321221993 and 1212321222011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212321222131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606160611015 + 606160611016.

It is an arithmetic number, because the mean of its divisors is an integer number (606160611016).

Almost surely, 2^{1212321222031} is an apocalyptic number.

1212321222031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212321222031 is an equidigital number, since it uses as much as digits as its factorization.

1212321222031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1212321222031 its reverse (1302221232121), we get a palindrome (2514542454152).

The spelling of 1212321222031 in words is "one trillion, two hundred twelve billion, three hundred twenty-one million, two hundred twenty-two thousand, thirty-one".