21000001134 has 64 divisors (see below), whose sum is σ = 48486034944. Its totient is φ = 5939383296.

The previous prime is 21000001091. The next prime is 21000001153. The reversal of 21000001134 is 43110000012.

It is a happy number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 4520617 + ... + 4525259.

It is an arithmetic number, because the mean of its divisors is an integer number (757594296).

Almost surely, 2^21000001134 is an apocalyptic number.

21000001134 is an abundant number, since it is smaller than the sum of its proper divisors (27486033810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21000001134 is a wasteful number, since it uses less digits than its factorization.

21000001134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5721.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21000001134 its reverse (43110000012), we get a palindrome (64110001146).

The spelling of 21000001134 in words is "twenty-one billion, one thousand, one hundred thirty-four".