21101203332 has 36 divisors (see below), whose sum is σ = 58188167856. Its totient is φ = 6394303920.

The previous prime is 21101203307. The next prime is 21101203339. The reversal of 21101203332 is 23330210112.

21101203332 is a `hidden beast` number, since 211 + 0 + 120 + 3 + 332 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (21101203339) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 26642538 + ... + 26643329.

It is an arithmetic number, because the mean of its divisors is an integer number (1616337996).

Almost surely, 2^21101203332 is an apocalyptic number.

21101203332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21101203332 is an abundant number, since it is smaller than the sum of its proper divisors (37086964524).

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

21101203332 is a wasteful number, since it uses less digits than its factorization.

21101203332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53285888 (or 53285883 counting only the distinct ones).

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

Adding to 21101203332 its reverse (23330210112), we get a palindrome (44431413444).

The spelling of 21101203332 in words is "twenty-one billion, one hundred one million, two hundred three thousand, three hundred thirty-two".