10209182021 has 2 divisors, whose sum is σ = 10209182022. Its totient is φ = 10209182020.

The previous prime is 10209181993. The next prime is 10209182029. The reversal of 10209182021 is 12028190201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10208879521 + 302500 = 101039^2 + 550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10209182021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10209182029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5104591010 + 5104591011.

It is an arithmetic number, because the mean of its divisors is an integer number (5104591011).

Almost surely, 2^10209182021 is an apocalyptic number.

It is an amenable number.

10209182021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10209182021 is an equidigital number, since it uses as much as digits as its factorization.

10209182021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 10209182021 in words is "ten billion, two hundred nine million, one hundred eighty-two thousand, twenty-one".