211423034421 has 24 divisors (see below), whose sum is σ = 311255334936. Its totient is φ = 138242856960.

The previous prime is 211423034393. The next prime is 211423034429. The reversal of 211423034421 is 124430324112.

211423034421 is a `hidden beast` number, since 2 + 1 + 1 + 4 + 230 + 3 + 4 + 421 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 107971388100 + 103451646321 = 328590^2 + 321639^2 .

It is not a de Polignac number, because 211423034421 - 2⁹ = 211423033909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211423034429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1377681 + ... + 1523433.

It is an arithmetic number, because the mean of its divisors is an integer number (12968972289).

Almost surely, 2^211423034421 is an apocalyptic number.

It is an amenable number.

211423034421 is a deficient number, since it is larger than the sum of its proper divisors (99832300515).

211423034421 is a wasteful number, since it uses less digits than its factorization.

211423034421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148853 (or 148850 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 211423034421 its reverse (124430324112), we get a palindrome (335853358533).

The spelling of 211423034421 in words is "two hundred eleven billion, four hundred twenty-three million, thirty-four thousand, four hundred twenty-one".