231021330202 has 16 divisors (see below), whose sum is σ = 373328869032. Its totient is φ = 106585067520.

The previous prime is 231021330167. The next prime is 231021330209. The reversal of 231021330202 is 202033120132.

It can be written as a sum of positive squares in 4 ways, for example, as 173406449241 + 57614880961 = 416421^2 + 240031^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 231021330202.

It is not an unprimeable number, because it can be changed into a prime (231021330209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1602999 + ... + 1741162.

Almost surely, 2^231021330202 is an apocalyptic number.

231021330202 is a deficient number, since it is larger than the sum of its proper divisors (142307538830).

231021330202 is a wasteful number, since it uses less digits than its factorization.

231021330202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346833.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 231021330202 its reverse (202033120132), we get a palindrome (433054450334).

The spelling of 231021330202 in words is "two hundred thirty-one billion, twenty-one million, three hundred thirty thousand, two hundred two".