20121201101117 has 2 divisors, whose sum is σ = 20121201101118. Its totient is φ = 20121201101116.

The previous prime is 20121201101101. The next prime is 20121201101129. The reversal of 20121201101117 is 71110110212102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19938136065796 + 183065035321 = 4465214^2 + 427861^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121201101117 - 2⁴ = 20121201101101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121201103117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060600550558 + 10060600550559.

It is an arithmetic number, because the mean of its divisors is an integer number (10060600550559).

Almost surely, 2^{20121201101117} is an apocalyptic number.

It is an amenable number.

20121201101117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121201101117 is an equidigital number, since it uses as much as digits as its factorization.

20121201101117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 20121201101117 its reverse (71110110212102), we get a palindrome (91231311313219).

The spelling of 20121201101117 in words is "twenty trillion, one hundred twenty-one billion, two hundred one million, one hundred one thousand, one hundred seventeen".