20121212213 has 2 divisors, whose sum is σ = 20121212214. Its totient is φ = 20121212212.

The previous prime is 20121212207. The next prime is 20121212219. The reversal of 20121212213 is 31221212102.

It is a balanced prime because it is at equal distance from previous prime (20121212207) and next prime (20121212219).

It can be written as a sum of positive squares in only one way, i.e., 19571450404 + 549761809 = 139898^2 + 23447^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121212213 - 2²² = 20117017909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20121212191 and 20121212200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121212219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060606106 + 10060606107.

It is an arithmetic number, because the mean of its divisors is an integer number (10060606107).

Almost surely, 2^20121212213 is an apocalyptic number.

It is an amenable number.

20121212213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121212213 is an equidigital number, since it uses as much as digits as its factorization.

20121212213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20121212213 its reverse (31221212102), we get a palindrome (51342424315).

The spelling of 20121212213 in words is "twenty billion, one hundred twenty-one million, two hundred twelve thousand, two hundred thirteen".