20102210012123 has 4 divisors (see below), whose sum is σ = 20102264815728. Its totient is φ = 20102155208520.

The previous prime is 20102210012107. The next prime is 20102210012177. The reversal of 20102210012123 is 32121001220102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20102210012123 - 2⁴ = 20102210012107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102210012723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26847863 + ... + 27586448.

It is an arithmetic number, because the mean of its divisors is an integer number (5025566203932).

Almost surely, 2^{20102210012123} is an apocalyptic number.

20102210012123 is a deficient number, since it is larger than the sum of its proper divisors (54803605).

20102210012123 is an equidigital number, since it uses as much as digits as its factorization.

20102210012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54803604.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20102210012123 its reverse (32121001220102), we get a palindrome (52223211232225).

The spelling of 20102210012123 in words is "twenty trillion, one hundred two billion, two hundred ten million, twelve thousand, one hundred twenty-three".