321222012 has 24 divisors (see below), whose sum is σ = 769776336. Its totient is φ = 104179968.

The previous prime is 321222001. The next prime is 321222023. The reversal of 321222012 is 210222123.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (321222001) and next prime (321222023).

It is a junction number, because it is equal to n+sod(n) for n = 321221982 and 321222000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361293 + ... + 362180.

It is an arithmetic number, because the mean of its divisors is an integer number (32074014).

Almost surely, 2^321222012 is an apocalyptic number.

It is an amenable number.

321222012 is an abundant number, since it is smaller than the sum of its proper divisors (448554324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321222012 is a wasteful number, since it uses less digits than its factorization.

321222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723517 (or 723515 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 321222012 is about 17922.6675469920. The cubic root of 321222012 is about 684.8599440159.

Adding to 321222012 its reverse (210222123), we get a palindrome (531444135).

The spelling of 321222012 in words is "three hundred twenty-one million, two hundred twenty-two thousand, twelve".