2102011200221 has 4 divisors (see below), whose sum is σ = 2102066269212. Its totient is φ = 2101956131232.

The previous prime is 2102011200193. The next prime is 2102011200229. The reversal of 2102011200221 is 1220021102012.

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 1097979144025 + 1004032056196 = 1047845^2 + 1002014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102011200221 - 2¹⁸ = 2102010938077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102011200196 and 2102011200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102011200229) 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, 27477200 + ... + 27553593.

It is an arithmetic number, because the mean of its divisors is an integer number (525516567303).

Almost surely, 2^{2102011200221} is an apocalyptic number.

It is an amenable number.

2102011200221 is a deficient number, since it is larger than the sum of its proper divisors (55068991).

2102011200221 is an equidigital number, since it uses as much as digits as its factorization.

2102011200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55068990.

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

Adding to 2102011200221 its reverse (1220021102012), we get a palindrome (3322032302233).

The spelling of 2102011200221 in words is "two trillion, one hundred two billion, eleven million, two hundred thousand, two hundred twenty-one".