2100020243 has 2 divisors, whose sum is σ = 2100020244. Its totient is φ = 2100020242.

The previous prime is 2100020227. The next prime is 2100020327. The reversal of 2100020243 is 3420200012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2100020243 - 2⁴ = 2100020227 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100070243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050010121 + 1050010122.

It is an arithmetic number, because the mean of its divisors is an integer number (1050010122).

Almost surely, 2^2100020243 is an apocalyptic number.

2100020243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100020243 is an equidigital number, since it uses as much as digits as its factorization.

2100020243 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 14.

The square root of 2100020243 is about 45825.9778182637. The cubic root of 2100020243 is about 1280.5832796987.

Adding to 2100020243 its reverse (3420200012), we get a palindrome (5520220255).

The spelling of 2100020243 in words is "two billion, one hundred million, twenty thousand, two hundred forty-three".