211421132 has 24 divisors (see below), whose sum is σ = 419420400. Its totient is φ = 92442816.

The previous prime is 211421123. The next prime is 211421137. The reversal of 211421132 is 231124112.

It is a super-2 number, since 2×211421132² = 89397790112322848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211421132.

It is not an unprimeable number, because it can be changed into a prime (211421137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106007 + ... + 107982.

It is an arithmetic number, because the mean of its divisors is an integer number (17475850).

Almost surely, 2^211421132 is an apocalyptic number.

It is an amenable number.

211421132 is a deficient number, since it is larger than the sum of its proper divisors (207999268).

211421132 is a wasteful number, since it uses less digits than its factorization.

211421132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214025 (or 214023 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 211421132 is about 14540.3277817249. The cubic root of 211421132 is about 595.7299912035.

Adding to 211421132 its reverse (231124112), we get a palindrome (442545244).

The spelling of 211421132 in words is "two hundred eleven million, four hundred twenty-one thousand, one hundred thirty-two".