20121220001167 has 2 divisors, whose sum is σ = 20121220001168. Its totient is φ = 20121220001166.

The previous prime is 20121220001161. The next prime is 20121220001269. The reversal of 20121220001167 is 76110002212102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121220001167 - 2⁷ = 20121220001039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121220001161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060610000583 + 10060610000584.

It is an arithmetic number, because the mean of its divisors is an integer number (10060610000584).

Almost surely, 2^{20121220001167} is an apocalyptic number.

20121220001167 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121220001167 is an equidigital number, since it uses as much as digits as its factorization.

20121220001167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 20121220001167 its reverse (76110002212102), we get a palindrome (96231222213269).

The spelling of 20121220001167 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, one thousand, one hundred sixty-seven".