2101000212221 has 2 divisors, whose sum is σ = 2101000212222. Its totient is φ = 2101000212220.

The previous prime is 2101000212163. The next prime is 2101000212253. The reversal of 2101000212221 is 1222120001012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1338764702500 + 762235509721 = 1157050^2 + 873061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101000212221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101000212196 and 2101000212205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101000212271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050500106110 + 1050500106111.

It is an arithmetic number, because the mean of its divisors is an integer number (1050500106111).

Almost surely, 2^{2101000212221} is an apocalyptic number.

It is an amenable number.

2101000212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101000212221 is an equidigital number, since it uses as much as digits as its factorization.

2101000212221 is an evil number, because the sum of its binary digits is even.

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

Adding to 2101000212221 its reverse (1222120001012), we get a palindrome (3323120213233).

The spelling of 2101000212221 in words is "two trillion, one hundred one billion, two hundred twelve thousand, two hundred twenty-one".