2101021073 has 2 divisors, whose sum is σ = 2101021074. Its totient is φ = 2101021072.

The previous prime is 2101021049. The next prime is 2101021127. The reversal of 2101021073 is 3701201012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1755358609 + 345662464 = 41897^2 + 18592^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101021073 - 2⁶ = 2101021009 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101021033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050510536 + 1050510537.

It is an arithmetic number, because the mean of its divisors is an integer number (1050510537).

Almost surely, 2^2101021073 is an apocalyptic number.

It is an amenable number.

2101021073 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101021073 is an equidigital number, since it uses as much as digits as its factorization.

2101021073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 2101021073 is about 45836.8964154424. The cubic root of 2101021073 is about 1280.7866813277.

Adding to 2101021073 its reverse (3701201012), we get a palindrome (5802222085).

The spelling of 2101021073 in words is "two billion, one hundred one million, twenty-one thousand, seventy-three".