211213231133 has 4 divisors (see below), whose sum is σ = 211214227548. Its totient is φ = 211212234720.

The previous prime is 211213231081. The next prime is 211213231139. The reversal of 211213231133 is 331132312112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 182258124889 + 28955106244 = 426917^2 + 170162^2 .

It is a cyclic number.

It is not a de Polignac number, because 211213231133 - 2¹⁴ = 211213214749 is a prime.

It is a super-2 number, since 2×211213231133² (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 = 211213231099 and 211213231108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211213231139) 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, 39416 + ... + 651137.

It is an arithmetic number, because the mean of its divisors is an integer number (52803556887).

Almost surely, 2^211213231133 is an apocalyptic number.

It is an amenable number.

211213231133 is a deficient number, since it is larger than the sum of its proper divisors (996415).

211213231133 is an equidigital number, since it uses as much as digits as its factorization.

211213231133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996414.

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

Adding to 211213231133 its reverse (331132312112), we get a palindrome (542345543245).

The spelling of 211213231133 in words is "two hundred eleven billion, two hundred thirteen million, two hundred thirty-one thousand, one hundred thirty-three".