2101241243 has 4 divisors (see below), whose sum is σ = 2101954800. Its totient is φ = 2100527688.

The previous prime is 2101241231. The next prime is 2101241279. The reversal of 2101241243 is 3421421012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101241243 is a prime.

It is a super-2 number, since 2×2101241243² = 8830429522568370098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101211243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352343 + ... + 358256.

It is an arithmetic number, because the mean of its divisors is an integer number (525488700).

Almost surely, 2^2101241243 is an apocalyptic number.

2101241243 is a deficient number, since it is larger than the sum of its proper divisors (713557).

2101241243 is an equidigital number, since it uses as much as digits as its factorization.

2101241243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713556.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2101241243 is about 45839.2980203668. The cubic root of 2101241243 is about 1280.8314184570.

Adding to 2101241243 its reverse (3421421012), we get a palindrome (5522662255).

The spelling of 2101241243 in words is "two billion, one hundred one million, two hundred forty-one thousand, two hundred forty-three".