212123144023 has 4 divisors (see below), whose sum is σ = 242426450320. Its totient is φ = 181819837728.

The previous prime is 212123143997. The next prime is 212123144041. The reversal of 212123144023 is 320441321212.

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 212123144023 - 2²⁹ = 211586273111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212123144083) 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, 15151653138 + ... + 15151653151.

It is an arithmetic number, because the mean of its divisors is an integer number (60606612580).

Almost surely, 2^212123144023 is an apocalyptic number.

212123144023 is a deficient number, since it is larger than the sum of its proper divisors (30303306297).

212123144023 is an equidigital number, since it uses as much as digits as its factorization.

212123144023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30303306296.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 212123144023 its reverse (320441321212), we get a palindrome (532564465235).

The spelling of 212123144023 in words is "two hundred twelve billion, one hundred twenty-three million, one hundred forty-four thousand, twenty-three".