20121120222101 has 16 divisors (see below), whose sum is σ = 21393644961600. Its totient is φ = 18870206882688.

The previous prime is 20121120222041. The next prime is 20121120222121. The reversal of 20121120222101 is 10122202112102.

It is a cyclic number.

It is not a de Polignac number, because 20121120222101 - 2³⁴ = 20103940352917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20121120222101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121120222121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 812936 + ... + 6395553.

It is an arithmetic number, because the mean of its divisors is an integer number (1337102810100).

Almost surely, 2^{20121120222101} is an apocalyptic number.

It is an amenable number.

20121120222101 is a deficient number, since it is larger than the sum of its proper divisors (1272524739499).

20121120222101 is a wasteful number, since it uses less digits than its factorization.

20121120222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7209988.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20121120222101 its reverse (10122202112102), we get a palindrome (30243322334203).

The spelling of 20121120222101 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, one hundred one".