20121120212101 has 32 divisors (see below), whose sum is σ = 20940534720000. Its totient is φ = 19322149708800.

The previous prime is 20121120212093. The next prime is 20121120212129. The reversal of 20121120212101 is 10121202112102.

It is a cyclic number.

It is not a de Polignac number, because 20121120212101 - 2³ = 20121120212093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121120212161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306229350 + ... + 306295048.

It is an arithmetic number, because the mean of its divisors is an integer number (654391710000).

Almost surely, 2^{20121120212101} is an apocalyptic number.

It is an amenable number.

20121120212101 is a deficient number, since it is larger than the sum of its proper divisors (819414507899).

20121120212101 is a wasteful number, since it uses less digits than its factorization.

20121120212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66429.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20121120212101 its reverse (10121202112102), we get a palindrome (30242322324203).

The spelling of 20121120212101 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, two hundred twelve thousand, one hundred one".