212013213231 has 4 divisors (see below), whose sum is σ = 282684284312. Its totient is φ = 141342142152.

The previous prime is 212013213227. The next prime is 212013213263. The reversal of 212013213231 is 132312310212.

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

It is not a de Polignac number, because 212013213231 - 2² = 212013213227 is a prime.

It is a super-2 number, since 2×212013213231² (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 = 212013213198 and 212013213207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212013218231) 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, 35335535536 + ... + 35335535541.

It is an arithmetic number, because the mean of its divisors is an integer number (70671071078).

Almost surely, 2^212013213231 is an apocalyptic number.

212013213231 is a deficient number, since it is larger than the sum of its proper divisors (70671071081).

212013213231 is an equidigital number, since it uses as much as digits as its factorization.

212013213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70671071080.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 212013213231 its reverse (132312310212), we get a palindrome (344325523443).

The spelling of 212013213231 in words is "two hundred twelve billion, thirteen million, two hundred thirteen thousand, two hundred thirty-one".