211434220023 has 32 divisors (see below), whose sum is σ = 311910110400. Its totient is φ = 126553383936.

The previous prime is 211434220021. The next prime is 211434220027. The reversal of 211434220023 is 320022434112.

It is a happy number.

It is not a de Polignac number, because 211434220023 - 2¹ = 211434220021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211434219975 and 211434220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211434220021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4462723 + ... + 4509851.

It is an arithmetic number, because the mean of its divisors is an integer number (9747190950).

Almost surely, 2^211434220023 is an apocalyptic number.

211434220023 is a deficient number, since it is larger than the sum of its proper divisors (100475890377).

211434220023 is a wasteful number, since it uses less digits than its factorization.

211434220023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50291.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 211434220023 its reverse (320022434112), we get a palindrome (531456654135).

The spelling of 211434220023 in words is "two hundred eleven billion, four hundred thirty-four million, two hundred twenty thousand, twenty-three".