21231130202 has 16 divisors (see below), whose sum is σ = 33711020640. Its totient is φ = 10011149232.

The previous prime is 21231130201. The next prime is 21231130223. The reversal of 21231130202 is 20203113212.

It is not an unprimeable number, because it can be changed into a prime (21231130201) 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 7 ways as a sum of consecutive naturals, for example, 4253948 + ... + 4258935.

It is an arithmetic number, because the mean of its divisors is an integer number (2106938790).

Almost surely, 2^21231130202 is an apocalyptic number.

21231130202 is a deficient number, since it is larger than the sum of its proper divisors (12479890438).

21231130202 is a wasteful number, since it uses less digits than its factorization.

21231130202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8512957.

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

Adding to 21231130202 its reverse (20203113212), we get a palindrome (41434243414).

The spelling of 21231130202 in words is "twenty-one billion, two hundred thirty-one million, one hundred thirty thousand, two hundred two".