20001224213 has 2 divisors, whose sum is σ = 20001224214. Its totient is φ = 20001224212.

The previous prime is 20001224137. The next prime is 20001224219. The reversal of 20001224213 is 31242210002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18913675729 + 1087548484 = 137527^2 + 32978^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001224213 - 2¹⁰ = 20001223189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001224191 and 20001224200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001224219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000612106 + 10000612107.

It is an arithmetic number, because the mean of its divisors is an integer number (10000612107).

Almost surely, 2^20001224213 is an apocalyptic number.

It is an amenable number.

20001224213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001224213 is an equidigital number, since it uses as much as digits as its factorization.

20001224213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20001224213 its reverse (31242210002), we get a palindrome (51243434215).

The spelling of 20001224213 in words is "twenty billion, one million, two hundred twenty-four thousand, two hundred thirteen".