2102313030221 has 4 divisors (see below), whose sum is σ = 2102353030272. Its totient is φ = 2102273030172.

The previous prime is 2102313030187. The next prime is 2102313030227. The reversal of 2102313030221 is 1220303132012.

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 2102313030221 - 2²² = 2102308835917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102313030193 and 2102313030202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102313030227) 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, 19921085 + ... + 20026338.

It is an arithmetic number, because the mean of its divisors is an integer number (525588257568).

Almost surely, 2^{2102313030221} is an apocalyptic number.

It is an amenable number.

2102313030221 is a deficient number, since it is larger than the sum of its proper divisors (40000051).

2102313030221 is an equidigital number, since it uses as much as digits as its factorization.

2102313030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40000050.

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

Adding to 2102313030221 its reverse (1220303132012), we get a palindrome (3322616162233).

The spelling of 2102313030221 in words is "two trillion, one hundred two billion, three hundred thirteen million, thirty thousand, two hundred twenty-one".