212031111331 has 8 divisors (see below), whose sum is σ = 228977249760. Its totient is φ = 195175837632.

The previous prime is 212031111329. The next prime is 212031111343. The reversal of 212031111331 is 133111130212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212031111331 - 2¹ = 212031111329 is a prime.

It is a super-2 number, since 2×212031111331² (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 = 212031111299 and 212031111308.

It is not an unprimeable number, because it can be changed into a prime (212037111331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22711330 + ... + 22720663.

It is an arithmetic number, because the mean of its divisors is an integer number (28622156220).

Almost surely, 2^212031111331 is an apocalyptic number.

212031111331 is a deficient number, since it is larger than the sum of its proper divisors (16946138429).

212031111331 is a wasteful number, since it uses less digits than its factorization.

212031111331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45432365.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 212031111331 its reverse (133111130212), we get a palindrome (345142241543).

The spelling of 212031111331 in words is "two hundred twelve billion, thirty-one million, one hundred eleven thousand, three hundred thirty-one".