2100221020121 has 8 divisors (see below), whose sum is σ = 2400286102464. Its totient is φ = 1800164314800.

The previous prime is 2100221020097. The next prime is 2100221020291. The reversal of 2100221020121 is 1210201220012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100221020121 - 2³⁰ = 2099147278297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2100221020096 and 2100221020105.

It is not an unprimeable number, because it can be changed into a prime (2100221028121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1547495 + ... + 2568108.

It is an arithmetic number, because the mean of its divisors is an integer number (300035762808).

Almost surely, 2^{2100221020121} is an apocalyptic number.

It is an amenable number.

2100221020121 is a deficient number, since it is larger than the sum of its proper divisors (300065082343).

2100221020121 is an equidigital number, since it uses as much as digits as its factorization.

2100221020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188511.

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

Adding to 2100221020121 its reverse (1210201220012), we get a palindrome (3310422240133).

The spelling of 2100221020121 in words is "two trillion, one hundred billion, two hundred twenty-one million, twenty thousand, one hundred twenty-one".