231020212033 has 4 divisors (see below), whose sum is σ = 248790997588. Its totient is φ = 213249426480.

The previous prime is 231020211941. The next prime is 231020212037. The reversal of 231020212033 is 330212020132.

231020212033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12845275569 + 218174936464 = 113337^2 + 467092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231020212033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231020212033.

It is not an unprimeable number, because it can be changed into a prime (231020212037) 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 3 ways as a sum of consecutive naturals, for example, 8885392758 + ... + 8885392783.

It is an arithmetic number, because the mean of its divisors is an integer number (62197749397).

Almost surely, 2^231020212033 is an apocalyptic number.

It is an amenable number.

231020212033 is a deficient number, since it is larger than the sum of its proper divisors (17770785555).

231020212033 is a wasteful number, since it uses less digits than its factorization.

231020212033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17770785554.

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

Adding to 231020212033 its reverse (330212020132), we get a palindrome (561232232165).

The spelling of 231020212033 in words is "two hundred thirty-one billion, twenty million, two hundred twelve thousand, thirty-three".