2100101243 has 2 divisors, whose sum is σ = 2100101244. Its totient is φ = 2100101242.

The previous prime is 2100101191. The next prime is 2100101251. The reversal of 2100101243 is 3421010012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2100101243 - 2⁸ = 2100100987 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100101543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050050621 + 1050050622.

It is an arithmetic number, because the mean of its divisors is an integer number (1050050622).

Almost surely, 2^2100101243 is an apocalyptic number.

2100101243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100101243 is an equidigital number, since it uses as much as digits as its factorization.

2100101243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2100101243 is about 45826.8615879377. The cubic root of 2100101243 is about 1280.5997439705.

Adding to 2100101243 its reverse (3421010012), we get a palindrome (5521111255).

The spelling of 2100101243 in words is "two billion, one hundred million, one hundred one thousand, two hundred forty-three".