2102200081 has 2 divisors, whose sum is σ = 2102200082. Its totient is φ = 2102200080.

The previous prime is 2102200063. The next prime is 2102200141. The reversal of 2102200081 is 1800022012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2041593856 + 60606225 = 45184^2 + 7785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102200081 is a prime.

It is a super-2 number, since 2×2102200081² = 8838490361112813122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2102200181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051100040 + 1051100041.

It is an arithmetic number, because the mean of its divisors is an integer number (1051100041).

Almost surely, 2^2102200081 is an apocalyptic number.

It is an amenable number.

2102200081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102200081 is an equidigital number, since it uses as much as digits as its factorization.

2102200081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2102200081 is about 45849.7555173416. The cubic root of 2102200081 is about 1281.0262117462.

Adding to 2102200081 its reverse (1800022012), we get a palindrome (3902222093).

The spelling of 2102200081 in words is "two billion, one hundred two million, two hundred thousand, eighty-one".