321212 has 12 divisors (see below), whose sum is σ = 567336. Its totient is φ = 159120.

The previous prime is 321203. The next prime is 321221. The reversal of 321212 is 212123.

It is a happy number.

321212 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (321203) and next prime (321221).

It is an alternating number because its digits alternate between odd and even.

321212 is a modest number, since divided by 1212 gives 32 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 321193 and 321202.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218 + ... + 830.

It is an arithmetic number, because the mean of its divisors is an integer number (47278).

2³²¹²¹² is an apocalyptic number.

It is an amenable number.

321212 is a deficient number, since it is larger than the sum of its proper divisors (246124).

321212 is a wasteful number, since it uses less digits than its factorization.

321212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748 (or 746 counting only the distinct ones).

The product of its digits is 24, while the sum is 11.

The square root of 321212 is about 566.7556792834. The cubic root of 321212 is about 68.4852828595.

Subtracting from 321212 its sum of digits (11), we obtain a triangular number (321201 = T₈₀₁).

Adding to 321212 its reverse (212123), we get a palindrome (533335).

It can be divided in two parts, 32121 and 2, that added together give a palindrome (32123).

The spelling of 321212 in words is "three hundred twenty-one thousand, two hundred twelve", and thus it is an iban number.