21125441134 has 8 divisors (see below), whose sum is σ = 36215041968. Its totient is φ = 9053760480.

The previous prime is 21125441111. The next prime is 21125441171. The reversal of 21125441134 is 43114452112.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 754480027 + ... + 754480054.

It is an arithmetic number, because the mean of its divisors is an integer number (4526880246).

Almost surely, 2^21125441134 is an apocalyptic number.

21125441134 is a deficient number, since it is larger than the sum of its proper divisors (15089600834).

21125441134 is a wasteful number, since it uses less digits than its factorization.

21125441134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508960090.

The product of its digits is 3840, while the sum is 28.

Adding to 21125441134 its reverse (43114452112), we get a palindrome (64239893246).

The spelling of 21125441134 in words is "twenty-one billion, one hundred twenty-five million, four hundred forty-one thousand, one hundred thirty-four".