231210030021 has 32 divisors (see below), whose sum is σ = 314751640320. Its totient is φ = 150928435200.

The previous prime is 231210029989. The next prime is 231210030137. The reversal of 231210030021 is 120030012132.

231210030021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231210030021 - 2⁵ = 231210029989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231210030521) 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 31 ways as a sum of consecutive naturals, for example, 52869991 + ... + 52874363.

It is an arithmetic number, because the mean of its divisors is an integer number (9835988760).

Almost surely, 2^231210030021 is an apocalyptic number.

It is an amenable number.

231210030021 is a deficient number, since it is larger than the sum of its proper divisors (83541610299).

231210030021 is a wasteful number, since it uses less digits than its factorization.

231210030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5677.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 231210030021 its reverse (120030012132), we get a palindrome (351240042153).

The spelling of 231210030021 in words is "two hundred thirty-one billion, two hundred ten million, thirty thousand, twenty-one".