21125103234 has 8 divisors (see below), whose sum is σ = 42250206480. Its totient is φ = 7041701076.

The previous prime is 21125103217. The next prime is 21125103271. The reversal of 21125103234 is 43230152112.

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

21125103234 is an admirable 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, 1760425264 + ... + 1760425275.

It is an arithmetic number, because the mean of its divisors is an integer number (5281275810).

Almost surely, 2^21125103234 is an apocalyptic number.

21125103234 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21125103234 is a wasteful number, since it uses less digits than its factorization.

21125103234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520850544.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21125103234 its reverse (43230152112), we get a palindrome (64355255346).

The spelling of 21125103234 in words is "twenty-one billion, one hundred twenty-five million, one hundred three thousand, two hundred thirty-four".