212333121131 has 4 divisors (see below), whose sum is σ = 212335254600. Its totient is φ = 212330987664.

The previous prime is 212333121103. The next prime is 212333121157. The reversal of 212333121131 is 131121333212.

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 212333121131 - 2¹⁰ = 212333120107 is a prime.

It is a super-2 number, since 2×212333121131² (a number of 23 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 = 212333121097 and 212333121106.

It is not an unprimeable number, because it can be changed into a prime (212333121631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909746 + ... + 1119063.

It is an arithmetic number, because the mean of its divisors is an integer number (53083813650).

Almost surely, 2^212333121131 is an apocalyptic number.

212333121131 is a deficient number, since it is larger than the sum of its proper divisors (2133469).

212333121131 is a wasteful number, since it uses less digits than its factorization.

212333121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133468.

The product of its digits is 648, while the sum is 23.

Adding to 212333121131 its reverse (131121333212), we get a palindrome (343454454343).

The spelling of 212333121131 in words is "two hundred twelve billion, three hundred thirty-three million, one hundred twenty-one thousand, one hundred thirty-one".