211422143421 has 12 divisors (see below), whose sum is σ = 305401676320. Its totient is φ = 140941571400.

The previous prime is 211422143399. The next prime is 211422143459. The reversal of 211422143421 is 124341224112.

211422143421 is a `hidden beast` number, since 2 + 1 + 1 + 4 + 221 + 434 + 2 + 1 = 666.

It is not a de Polignac number, because 211422143421 - 2¹⁷ = 211422012349 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 (211422147421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334201 + ... + 731118.

Almost surely, 2^211422143421 is an apocalyptic number.

It is an amenable number.

211422143421 is a deficient number, since it is larger than the sum of its proper divisors (93979532899).

211422143421 is a wasteful number, since it uses less digits than its factorization.

211422143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087376 (or 1087373 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 211422143421 its reverse (124341224112), we get a palindrome (335763367533).

The spelling of 211422143421 in words is "two hundred eleven billion, four hundred twenty-two million, one hundred forty-three thousand, four hundred twenty-one".