2123211043 has 4 divisors (see below), whose sum is σ = 2172588088. Its totient is φ = 2073834000.

The previous prime is 2123211023. The next prime is 2123211053. The reversal of 2123211043 is 3401123212.

It is a happy number.

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-2123211043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123211043.

It is not an unprimeable number, because it can be changed into a prime (2123211023) 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, 24688458 + ... + 24688543.

It is an arithmetic number, because the mean of its divisors is an integer number (543147022).

Almost surely, 2^2123211043 is an apocalyptic number.

2123211043 is a deficient number, since it is larger than the sum of its proper divisors (49377045).

2123211043 is an equidigital number, since it uses as much as digits as its factorization.

2123211043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49377044.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2123211043 is about 46078.3142378278. The cubic root of 2123211043 is about 1285.2799166126.

Adding to 2123211043 its reverse (3401123212), we get a palindrome (5524334255).

The spelling of 2123211043 in words is "two billion, one hundred twenty-three million, two hundred eleven thousand, forty-three".