231202213331 has 4 divisors (see below), whose sum is σ = 232220725512. Its totient is φ = 230183701152.

The previous prime is 231202213321. The next prime is 231202213369. The reversal of 231202213331 is 133312202132.

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

It is a cyclic number.

It is not a de Polignac number, because 231202213331 - 2⁶ = 231202213267 is a prime.

It is a super-2 number, since 2×231202213331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231202213297 and 231202213306.

It is not an unprimeable number, because it can be changed into a prime (231202213321) 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 3 ways as a sum of consecutive naturals, for example, 509255750 + ... + 509256203.

It is an arithmetic number, because the mean of its divisors is an integer number (58055181378).

Almost surely, 2^231202213331 is an apocalyptic number.

231202213331 is a deficient number, since it is larger than the sum of its proper divisors (1018512181).

231202213331 is a wasteful number, since it uses less digits than its factorization.

231202213331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018512180.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 231202213331 its reverse (133312202132), we get a palindrome (364514415463).

The spelling of 231202213331 in words is "two hundred thirty-one billion, two hundred two million, two hundred thirteen thousand, three hundred thirty-one".