21134201210 has 16 divisors (see below), whose sum is σ = 38079282600. Its totient is φ = 8445298176.

The previous prime is 21134201203. The next prime is 21134201233. The reversal of 21134201210 is 1210243112.

It can be written as a sum of positive squares in 4 ways, for example, as 19284599161 + 1849602049 = 138869^2 + 43007^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1037195 + ... + 1057374.

Almost surely, 2^21134201210 is an apocalyptic number.

21134201210 is a deficient number, since it is larger than the sum of its proper divisors (16945081390).

21134201210 is a wasteful number, since it uses less digits than its factorization.

21134201210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095585.

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

Adding to 21134201210 its reverse (1210243112), we get a palindrome (22344444322).

The spelling of 21134201210 in words is "twenty-one billion, one hundred thirty-four million, two hundred one thousand, two hundred ten".