20102202100121 has 4 divisors (see below), whose sum is σ = 20102211495012. Its totient is φ = 20102192705232.

The previous prime is 20102202100111. The next prime is 20102202100133. The reversal of 20102202100121 is 12100120220102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9493084777225 + 10609117322896 = 3081085^2 + 3257164^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102202100121 - 2¹⁰ = 20102202099097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102202100096 and 20102202100105.

It is not an unprimeable number, because it can be changed into a prime (20102202100111) 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 3 ways as a sum of consecutive naturals, for example, 246695 + ... + 6345491.

It is an arithmetic number, because the mean of its divisors is an integer number (5025552873753).

Almost surely, 2^{20102202100121} is an apocalyptic number.

It is an amenable number.

20102202100121 is a deficient number, since it is larger than the sum of its proper divisors (9394891).

20102202100121 is an equidigital number, since it uses as much as digits as its factorization.

20102202100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9394890.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20102202100121 its reverse (12100120220102), we get a palindrome (32202322320223).

The spelling of 20102202100121 in words is "twenty trillion, one hundred two billion, two hundred two million, one hundred thousand, one hundred twenty-one".