1820110100201 has 2 divisors, whose sum is σ = 1820110100202. Its totient is φ = 1820110100200.

The previous prime is 1820110100099. The next prime is 1820110100239. The reversal of 1820110100201 is 1020010110281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1459988890000 + 360121210201 = 1208300^2 + 600101^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820110100201 - 2²² = 1820105905897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1820110100201.

It is not a weakly prime, because it can be changed into another prime (1820110100251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910055050100 + 910055050101.

It is an arithmetic number, because the mean of its divisors is an integer number (910055050101).

Almost surely, 2^{1820110100201} is an apocalyptic number.

It is an amenable number.

1820110100201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1820110100201 is an equidigital number, since it uses as much as digits as its factorization.

1820110100201 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 17.

Adding to 1820110100201 its reverse (1020010110281), we get a palindrome (2840120210482).

The spelling of 1820110100201 in words is "one trillion, eight hundred twenty billion, one hundred ten million, one hundred thousand, two hundred one".