21202100032 has 28 divisors (see below), whose sum is σ = 42117186276. Its totient is φ = 10589895680.

The previous prime is 21202099987. The next prime is 21202100033. The reversal of 21202100032 is 23000120212.

It can be written as a sum of positive squares in 2 ways, for example, as 15501246016 + 5700854016 = 124504^2 + 75504^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21202099985 and 21202100021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202100033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112819 + ... + 234802.

Almost surely, 2^21202100032 is an apocalyptic number.

It is an amenable number.

21202100032 is a deficient number, since it is larger than the sum of its proper divisors (20915086244).

21202100032 is an equidigital number, since it uses as much as digits as its factorization.

21202100032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348586 (or 348576 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21202100032 its reverse (23000120212), we get a palindrome (44202220244).

The spelling of 21202100032 in words is "twenty-one billion, two hundred two million, one hundred thousand, thirty-two".