21125230335030 has 64 divisors (see below), whose sum is σ = 51321616174080. Its totient is φ = 5564414735616.

The previous prime is 21125230334993. The next prime is 21125230335049. The reversal of 21125230335030 is 3053303252112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11705274 + ... + 13388946.

It is an arithmetic number, because the mean of its divisors is an integer number (801900252720).

Almost surely, 2^{21125230335030} is an apocalyptic number.

21125230335030 is an abundant number, since it is smaller than the sum of its proper divisors (30196385839050).

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

21125230335030 is a wasteful number, since it uses less digits than its factorization.

21125230335030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688805.

The product of its (nonzero) digits is 16200, while the sum is 30.

Adding to 21125230335030 its reverse (3053303252112), we get a palindrome (24178533587142).

The spelling of 21125230335030 in words is "twenty-one trillion, one hundred twenty-five billion, two hundred thirty million, three hundred thirty-five thousand, thirty".