212013231227 has 4 divisors (see below), whose sum is σ = 242300835696. Its totient is φ = 181725626760.

The previous prime is 212013231187. The next prime is 212013231229. The reversal of 212013231227 is 722132310212.

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 212013231227 - 2⁸ = 212013230971 is a prime.

It is a super-2 number, since 2×212013231227² (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 = 212013231196 and 212013231205.

It is not an unprimeable number, because it can be changed into a prime (212013231229) 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, 15143802224 + ... + 15143802237.

It is an arithmetic number, because the mean of its divisors is an integer number (60575208924).

Almost surely, 2^212013231227 is an apocalyptic number.

212013231227 is a deficient number, since it is larger than the sum of its proper divisors (30287604469).

212013231227 is an equidigital number, since it uses as much as digits as its factorization.

212013231227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30287604468.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 212013231227 its reverse (722132310212), we get a palindrome (934145541439).

The spelling of 212013231227 in words is "two hundred twelve billion, thirteen million, two hundred thirty-one thousand, two hundred twenty-seven".