21101203032 has 128 divisors (see below), whose sum is σ = 64997237760. Its totient is φ = 5559114240.

The previous prime is 21101202973. The next prime is 21101203037. The reversal of 21101203032 is 23030210112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101203037) 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 31 ways as a sum of consecutive naturals, for example, 2225133 + ... + 2234595.

It is an arithmetic number, because the mean of its divisors is an integer number (507790920).

Almost surely, 2^21101203032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21101203032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32498618880).

21101203032 is an abundant number, since it is smaller than the sum of its proper divisors (43896034728).

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

21101203032 is a wasteful number, since it uses less digits than its factorization.

21101203032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10513 (or 10509 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21101203032 its reverse (23030210112), we get a palindrome (44131413144).

The spelling of 21101203032 in words is "twenty-one billion, one hundred one million, two hundred three thousand, thirty-two".