21131100202 has 8 divisors (see below), whose sum is σ = 31717800000. Its totient is φ = 10558500204.

The previous prime is 21131100197. The next prime is 21131100203. The reversal of 21131100202 is 20200113112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21131100203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3521202 + ... + 3527197.

It is an arithmetic number, because the mean of its divisors is an integer number (3964725000).

Almost surely, 2^21131100202 is an apocalyptic number.

21131100202 is a deficient number, since it is larger than the sum of its proper divisors (10586699798).

21131100202 is a wasteful number, since it uses less digits than its factorization.

21131100202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7049900.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21131100202 its reverse (20200113112), we get a palindrome (41331213314).

The spelling of 21131100202 in words is "twenty-one billion, one hundred thirty-one million, one hundred thousand, two hundred two".