20321212312213 has 2 divisors, whose sum is σ = 20321212312214. Its totient is φ = 20321212312212.

The previous prime is 20321212312183. The next prime is 20321212312241. The reversal of 20321212312213 is 31221321212302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20302080443089 + 19131869124 = 4505783^2 + 138318^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321212312213 - 2⁴¹ = 18122189056661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20321212312813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160606156106 + 10160606156107.

It is an arithmetic number, because the mean of its divisors is an integer number (10160606156107).

Almost surely, 2^{20321212312213} is an apocalyptic number.

It is an amenable number.

20321212312213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321212312213 is an equidigital number, since it uses as much as digits as its factorization.

20321212312213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 20321212312213 its reverse (31221321212302), we get a palindrome (51542533524515).

The spelling of 20321212312213 in words is "twenty trillion, three hundred twenty-one billion, two hundred twelve million, three hundred twelve thousand, two hundred thirteen".