211213330331 has 4 divisors (see below), whose sum is σ = 211267394472. Its totient is φ = 211159266192.

The previous prime is 211213330267. The next prime is 211213330357. The reversal of 211213330331 is 133033312112.

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 211213330331 - 2⁶ = 211213330267 is a prime.

It is a super-2 number, since 2×211213330331² (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 = 211213330297 and 211213330306.

It is not an unprimeable number, because it can be changed into a prime (211213380331) 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, 27026210 + ... + 27034023.

It is an arithmetic number, because the mean of its divisors is an integer number (52816848618).

Almost surely, 2^211213330331 is an apocalyptic number.

211213330331 is a deficient number, since it is larger than the sum of its proper divisors (54064141).

211213330331 is an equidigital number, since it uses as much as digits as its factorization.

211213330331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54064140.

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

Adding to 211213330331 its reverse (133033312112), we get a palindrome (344246642443).

The spelling of 211213330331 in words is "two hundred eleven billion, two hundred thirteen million, three hundred thirty thousand, three hundred thirty-one".