212030111231 has 4 divisors (see below), whose sum is σ = 212036683152. Its totient is φ = 212023539312.

The previous prime is 212030111213. The next prime is 212030111233. The reversal of 212030111231 is 132111030212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212030111231 is a prime.

It is a super-2 number, since 2×212030111231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212030111233) 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, 3237326 + ... + 3302171.

It is an arithmetic number, because the mean of its divisors is an integer number (53009170788).

Almost surely, 2^212030111231 is an apocalyptic number.

212030111231 is a deficient number, since it is larger than the sum of its proper divisors (6571921).

212030111231 is an equidigital number, since it uses as much as digits as its factorization.

212030111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6571920.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 212030111231 its reverse (132111030212), we get a palindrome (344141141443).

The spelling of 212030111231 in words is "two hundred twelve billion, thirty million, one hundred eleven thousand, two hundred thirty-one".