2101212043 has 4 divisors (see below), whose sum is σ = 2401385200. Its totient is φ = 1801038888.

The previous prime is 2101212041. The next prime is 2101212049. The reversal of 2101212043 is 3402121012.

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 2101212043 - 2¹ = 2101212041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101212041) 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, 150086568 + ... + 150086581.

It is an arithmetic number, because the mean of its divisors is an integer number (600346300).

Almost surely, 2^2101212043 is an apocalyptic number.

2101212043 is a deficient number, since it is larger than the sum of its proper divisors (300173157).

2101212043 is an equidigital number, since it uses as much as digits as its factorization.

2101212043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300173156.

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

The square root of 2101212043 is about 45838.9795152554. The cubic root of 2101212043 is about 1280.8254853844.

Adding to 2101212043 its reverse (3402121012), we get a palindrome (5503333055).

The spelling of 2101212043 in words is "two billion, one hundred one million, two hundred twelve thousand, forty-three".