2101043221 has 2 divisors, whose sum is σ = 2101043222. Its totient is φ = 2101043220.

The previous prime is 2101043201. The next prime is 2101043227. The reversal of 2101043221 is 1223401012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1163764996 + 937278225 = 34114^2 + 30615^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101043221 - 2⁷ = 2101043093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101043195 and 2101043204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101043227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050521610 + 1050521611.

It is an arithmetic number, because the mean of its divisors is an integer number (1050521611).

Almost surely, 2^2101043221 is an apocalyptic number.

It is an amenable number.

2101043221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101043221 is an equidigital number, since it uses as much as digits as its factorization.

2101043221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2101043221 is about 45837.1380105696. The cubic root of 2101043221 is about 1280.7911818004.

Adding to 2101043221 its reverse (1223401012), we get a palindrome (3324444233).

The spelling of 2101043221 in words is "two billion, one hundred one million, forty-three thousand, two hundred twenty-one".