321212097 has 6 divisors (see below), whose sum is σ = 463973042. Its totient is φ = 214141392.

The previous prime is 321212077. The next prime is 321212159. The reversal of 321212097 is 790212123.

It can be written as a sum of positive squares in only one way, i.e., 240374016 + 80838081 = 15504^2 + 8991^2 .

It is not a de Polignac number, because 321212097 - 2²⁰ = 320163521 is a prime.

It is a super-2 number, since 2×321212097² = 206354422518274818, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321212097.

It is not an unprimeable number, because it can be changed into a prime (321212057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17845108 + ... + 17845125.

Almost surely, 2^321212097 is an apocalyptic number.

It is an amenable number.

321212097 is a deficient number, since it is larger than the sum of its proper divisors (142760945).

321212097 is a wasteful number, since it uses less digits than its factorization.

321212097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35690239 (or 35690236 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 321212097 is about 17922.3909398272. The cubic root of 321212097 is about 684.8528975330.

The spelling of 321212097 in words is "three hundred twenty-one million, two hundred twelve thousand, ninety-seven".