211422521421 has 12 divisors (see below), whose sum is σ = 305723321280. Its totient is φ = 140793623880.

The previous prime is 211422521411. The next prime is 211422521423. The reversal of 211422521421 is 124125224112.

211422521421 is a `hidden beast` number, since 2 + 1 + 1 + 422 + 5 + 214 + 21 = 666.

It is not a de Polignac number, because 211422521421 - 2⁶ = 211422521357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211422521423) 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, 12884991 + ... + 12901388.

It is an arithmetic number, because the mean of its divisors is an integer number (25476943440).

Almost surely, 2^211422521421 is an apocalyptic number.

It is an amenable number.

211422521421 is a deficient number, since it is larger than the sum of its proper divisors (94300799859).

211422521421 is a wasteful number, since it uses less digits than its factorization.

211422521421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25787296 (or 25787293 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

Adding to 211422521421 its reverse (124125224112), we get a palindrome (335547745533).

The spelling of 211422521421 in words is "two hundred eleven billion, four hundred twenty-two million, five hundred twenty-one thousand, four hundred twenty-one".