131211023333 has 4 divisors (see below), whose sum is σ = 141304178988. Its totient is φ = 121117867680.

The previous prime is 131211023311. The next prime is 131211023351. The reversal of 131211023333 is 333320112131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 333320112131 = 47779 ⋅6976289.

It can be written as a sum of positive squares in 2 ways, for example, as 65780964484 + 65430058849 = 256478^2 + 255793^2 .

It is a cyclic number.

It is not a de Polignac number, because 131211023333 - 2⁶ = 131211023269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131211023299 and 131211023308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211023303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5046577808 + ... + 5046577833.

It is an arithmetic number, because the mean of its divisors is an integer number (35326044747).

Almost surely, 2^131211023333 is an apocalyptic number.

131211023333 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131211023333 is a deficient number, since it is larger than the sum of its proper divisors (10093155655).

131211023333 is a wasteful number, since it uses less digits than its factorization.

131211023333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10093155654.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 131211023333 its reverse (333320112131), we get a palindrome (464531135464).

The spelling of 131211023333 in words is "one hundred thirty-one billion, two hundred eleven million, twenty-three thousand, three hundred thirty-three".