3121222 has 8 divisors (see below), whose sum is σ = 5042016.
Its totient is φ = 1440552.
The previous prime is 3121219. The next prime is 3121229. The reversal of 3121222 is 2221213.
Adding to 3121222 its reverse (2221213), we get a palindrome (5342435).
Subtracting from 3121222 its reverse (2221213), we obtain a palindrome (900009).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a Harshad number since it is a multiple of its sum of digits (13).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3121229) 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, 59998 + ... + 60049.
It is an arithmetic number, because the mean of its divisors is an integer number (630252).
Almost surely, 23121222 is an apocalyptic number.
3121222 is a deficient number, since it is larger than the sum of its proper divisors (1920794).
3121222 is a wasteful number, since it uses less digits than its factorization.
3121222 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 120062.
The product of its digits is 48, while the sum is 13.
The square root of 3121222 is about 1766.6980500357.
The cubic root of 3121222 is about 146.1419461438.
The spelling of 3121222 in words is "three million, one hundred twenty-one thousand, two hundred twenty-two".