21101001032 has 16 divisors (see below), whose sum is σ = 39655756140. Its totient is φ = 10526132736.

The previous prime is 21101001017. The next prime is 21101001037. The reversal of 21101001032 is 23010010112.

It can be written as a sum of positive squares in 2 ways, for example, as 18083256676 + 3017744356 = 134474^2 + 54934^2 .

It is not an unprimeable number, because it can be changed into a prime (21101001037) 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 3 ways as a sum of consecutive naturals, for example, 3042293 + ... + 3049220.

Almost surely, 2^21101001032 is an apocalyptic number.

It is an amenable number.

21101001032 is a deficient number, since it is larger than the sum of its proper divisors (18554755108).

21101001032 is a wasteful number, since it uses less digits than its factorization.

21101001032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6091952 (or 6091948 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21101001032 its reverse (23010010112), we get a palindrome (44111011144).

The spelling of 21101001032 in words is "twenty-one billion, one hundred one million, one thousand, thirty-two".