2130312102221 has 2 divisors, whose sum is σ = 2130312102222. Its totient is φ = 2130312102220.

The previous prime is 2130312102209. The next prime is 2130312102311. The reversal of 2130312102221 is 1222012130312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1897878193225 + 232433908996 = 1377635^2 + 482114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2130312102221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2130312102193 and 2130312102202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2130312122221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065156051110 + 1065156051111.

It is an arithmetic number, because the mean of its divisors is an integer number (1065156051111).

Almost surely, 2^{2130312102221} is an apocalyptic number.

It is an amenable number.

2130312102221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130312102221 is an equidigital number, since it uses as much as digits as its factorization.

2130312102221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2130312102221 its reverse (1222012130312), we get a palindrome (3352324232533).

The spelling of 2130312102221 in words is "two trillion, one hundred thirty billion, three hundred twelve million, one hundred two thousand, two hundred twenty-one".