20122121212101 has 6 divisors (see below), whose sum is σ = 29065286195270. Its totient is φ = 13414747474728.

The previous prime is 20122121212073. The next prime is 20122121212103. The reversal of 20122121212101 is 10121212122102.

20122121212101 is a `hidden beast` number, since 20 + 1 + 221 + 212 + 1 + 210 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19475681091876 + 646440120225 = 4413126^2 + 804015^2 .

It is not a de Polignac number, because 20122121212101 - 2¹⁰ = 20122121211077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122121212103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1117895622886 + ... + 1117895622903.

Almost surely, 2^{20122121212101} is an apocalyptic number.

It is an amenable number.

20122121212101 is a deficient number, since it is larger than the sum of its proper divisors (8943164983169).

20122121212101 is a wasteful number, since it uses less digits than its factorization.

20122121212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235791245795 (or 2235791245792 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20122121212101 its reverse (10121212122102), we get a palindrome (30243333334203).

The spelling of 20122121212101 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred one".