2100123330221 has 16 divisors (see below), whose sum is σ = 2458804322304. Its totient is φ = 1756205209584.

The previous prime is 2100123330167. The next prime is 2100123330241. The reversal of 2100123330221 is 1220333210012.

It is not a de Polignac number, because 2100123330221 - 2³⁰ = 2099049588397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100123330193 and 2100123330202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100123330241) 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, 3782621 + ... + 4302146.

It is an arithmetic number, because the mean of its divisors is an integer number (153675270144).

Almost surely, 2^{2100123330221} is an apocalyptic number.

It is an amenable number.

2100123330221 is a deficient number, since it is larger than the sum of its proper divisors (358680992083).

2100123330221 is an equidigital number, since it uses as much as digits as its factorization.

2100123330221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8085680.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2100123330221 its reverse (1220333210012), we get a palindrome (3320456540233).

The spelling of 2100123330221 in words is "two trillion, one hundred billion, one hundred twenty-three million, three hundred thirty thousand, two hundred twenty-one".