20102103121 has 4 divisors (see below), whose sum is σ = 20106035200. Its totient is φ = 20098171044.

The previous prime is 20102103089. The next prime is 20102103143. The reversal of 20102103121 is 12130120102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20102103121 - 2⁵ = 20102103089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102103191) 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, 1958361 + ... + 1968598.

It is an arithmetic number, because the mean of its divisors is an integer number (5026508800).

Almost surely, 2^20102103121 is an apocalyptic number.

It is an amenable number.

20102103121 is a deficient number, since it is larger than the sum of its proper divisors (3932079).

20102103121 is an equidigital number, since it uses as much as digits as its factorization.

20102103121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932078.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20102103121 its reverse (12130120102), we get a palindrome (32232223223).

The spelling of 20102103121 in words is "twenty billion, one hundred two million, one hundred three thousand, one hundred twenty-one".