211432223421 has 72 divisors (see below), whose sum is σ = 344640410400. Its totient is φ = 124524864000.

The previous prime is 211432223417. The next prime is 211432223507. The reversal of 211432223421 is 124322234112.

211432223421 is a `hidden beast` number, since 2 + 1 + 1 + 432 + 223 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 211432223421 - 2² = 211432223417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211432221421) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5367046 + ... + 5406296.

Almost surely, 2^211432223421 is an apocalyptic number.

It is an amenable number.

211432223421 is a deficient number, since it is larger than the sum of its proper divisors (133208186979).

211432223421 is a wasteful number, since it uses less digits than its factorization.

211432223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39419 (or 39399 counting only the distinct ones).

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

Adding to 211432223421 its reverse (124322234112), we get a palindrome (335754457533).

The spelling of 211432223421 in words is "two hundred eleven billion, four hundred thirty-two million, two hundred twenty-three thousand, four hundred twenty-one".