21043101032 has 8 divisors (see below), whose sum is σ = 39455814450. Its totient is φ = 10521550512.

The previous prime is 21043101019. The next prime is 21043101067. The reversal of 21043101032 is 23010134012.

It can be written as a sum of positive squares in only one way, i.e., 19447418116 + 1595682916 = 139454^2 + 39946^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21043101032.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1315193807 + ... + 1315193822.

Almost surely, 2^21043101032 is an apocalyptic number.

It is an amenable number.

21043101032 is a deficient number, since it is larger than the sum of its proper divisors (18412713418).

21043101032 is a wasteful number, since it uses less digits than its factorization.

21043101032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630387635 (or 2630387631 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21043101032 its reverse (23010134012), we get a palindrome (44053235044).

The spelling of 21043101032 in words is "twenty-one billion, forty-three million, one hundred one thousand, thirty-two".