21101232330 has 96 divisors (see below), whose sum is σ = 56322998784. Its totient is φ = 5478524928.

The previous prime is 21101232281. The next prime is 21101232343. The reversal of 21101232330 is 3323210112.

21101232330 is a `hidden beast` number, since 2 + 1 + 101 + 232 + 330 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 803467 + ... + 829313.

It is an arithmetic number, because the mean of its divisors is an integer number (586697904).

Almost surely, 2^21101232330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21101232330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28161499392).

21101232330 is an abundant number, since it is smaller than the sum of its proper divisors (35221766454).

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

21101232330 is a wasteful number, since it uses less digits than its factorization.

21101232330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26100 (or 26097 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21101232330 its reverse (3323210112), we get a palindrome (24424442442).

It can be divided in two parts, 211012 and 32330, that added together give a palindrome (243342).

The spelling of 21101232330 in words is "twenty-one billion, one hundred one million, two hundred thirty-two thousand, three hundred thirty".