20121211222207 has 2 divisors, whose sum is σ = 20121211222208. Its totient is φ = 20121211222206.

The previous prime is 20121211222171. The next prime is 20121211222271. The reversal of 20121211222207 is 70222211212102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121211222207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121211222507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060605611103 + 10060605611104.

It is an arithmetic number, because the mean of its divisors is an integer number (10060605611104).

Almost surely, 2^{20121211222207} is an apocalyptic number.

20121211222207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121211222207 is an equidigital number, since it uses as much as digits as its factorization.

20121211222207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 20121211222207 its reverse (70222211212102), we get a palindrome (90343422434309).

The spelling of 20121211222207 in words is "twenty trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred seven".