2100121100201 has 4 divisors (see below), whose sum is σ = 2100655622100. Its totient is φ = 2099586578304.

The previous prime is 2100121100197. The next prime is 2100121100221. The reversal of 2100121100201 is 1020011210012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 681285160000 + 1418835940201 = 825400^2 + 1191149^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100121100201 - 2² = 2100121100197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2100121100221) 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, 267255056 + ... + 267262913.

It is an arithmetic number, because the mean of its divisors is an integer number (525163905525).

Almost surely, 2^{2100121100201} is an apocalyptic number.

It is an amenable number.

2100121100201 is a deficient number, since it is larger than the sum of its proper divisors (534521899).

2100121100201 is an equidigital number, since it uses as much as digits as its factorization.

2100121100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534521898.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2100121100201 its reverse (1020011210012), we get a palindrome (3120132310213).

The spelling of 2100121100201 in words is "two trillion, one hundred billion, one hundred twenty-one million, one hundred thousand, two hundred one".