21134211 has 8 divisors (see below), whose sum is σ = 32204544. Its totient is φ = 12076680.

The previous prime is 21134173. The next prime is 21134221. The reversal of 21134211 is 11243112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21134211 - 2¹⁴ = 21117827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21134221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503175 + ... + 503216.

It is an arithmetic number, because the mean of its divisors is an integer number (4025568).

Almost surely, 2^21134211 is an apocalyptic number.

21134211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21134211 is a deficient number, since it is larger than the sum of its proper divisors (11070333).

21134211 is a wasteful number, since it uses less digits than its factorization.

21134211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006401.

The product of its digits is 48, while the sum is 15.

The square root of 21134211 is about 4597.1959932115. The cubic root of 21134211 is about 276.4789127905.

Adding to 21134211 its reverse (11243112), we get a palindrome (32377323).

The spelling of 21134211 in words is "twenty-one million, one hundred thirty-four thousand, two hundred eleven".