211021234023423 has 16 divisors (see below), whose sum is σ = 282142070439680. Its totient is φ = 140290710267456.

The previous prime is 211021234023367. The next prime is 211021234023491. The reversal of 211021234023423 is 324320432120112.

It is a happy number.

It is not a de Polignac number, because 211021234023423 - 2⁶ = 211021234023359 is a prime.

It is a super-2 number, since 2×211021234023423² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211021234025423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4078315 + ... + 20944572.

It is an arithmetic number, because the mean of its divisors is an integer number (17633879402480).

Almost surely, 2^{211021234023423} is an apocalyptic number.

211021234023423 is a deficient number, since it is larger than the sum of its proper divisors (71120836416257).

211021234023423 is a wasteful number, since it uses less digits than its factorization.

211021234023423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25030686.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 211021234023423 its reverse (324320432120112), we get a palindrome (535341666143535).

The spelling of 211021234023423 in words is "two hundred eleven trillion, twenty-one billion, two hundred thirty-four million, twenty-three thousand, four hundred twenty-three".