20101222121047 has 2 divisors, whose sum is σ = 20101222121048. Its totient is φ = 20101222121046.

The previous prime is 20101222120997. The next prime is 20101222121051. The reversal of 20101222121047 is 74012122210102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20101222121047 - 2¹⁹ = 20101221596759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101222124047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050611060523 + 10050611060524.

It is an arithmetic number, because the mean of its divisors is an integer number (10050611060524).

Almost surely, 2^{20101222121047} is an apocalyptic number.

20101222121047 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101222121047 is an equidigital number, since it uses as much as digits as its factorization.

20101222121047 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 20101222121047 its reverse (74012122210102), we get a palindrome (94113344331149).

The spelling of 20101222121047 in words is "twenty trillion, one hundred one billion, two hundred twenty-two million, one hundred twenty-one thousand, forty-seven".