2120101243 has 4 divisors (see below), whose sum is σ = 2283185968. Its totient is φ = 1957016520.

The previous prime is 2120101223. The next prime is 2120101261. The reversal of 2120101243 is 3421010212.

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

It is a cyclic number.

It is not a de Polignac number, because 2120101243 - 2⁵ = 2120101211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120101223) 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, 81542343 + ... + 81542368.

It is an arithmetic number, because the mean of its divisors is an integer number (570796492).

Almost surely, 2^2120101243 is an apocalyptic number.

2120101243 is a deficient number, since it is larger than the sum of its proper divisors (163084725).

2120101243 is a wasteful number, since it uses less digits than its factorization.

2120101243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163084724.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2120101243 is about 46044.5571484839. The cubic root of 2120101243 is about 1284.6521070667.

Adding to 2120101243 its reverse (3421010212), we get a palindrome (5541111455).

The spelling of 2120101243 in words is "two billion, one hundred twenty million, one hundred one thousand, two hundred forty-three".