321210522212 has 6 divisors (see below), whose sum is σ = 562118413878. Its totient is φ = 160605261104.

The previous prime is 321210522211. The next prime is 321210522247. The reversal of 321210522212 is 212225012123.

It can be written as a sum of positive squares in only one way, i.e., 307022377216 + 14188144996 = 554096^2 + 119114^2 .

It is not an unprimeable number, because it can be changed into a prime (321210522211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40151315273 + ... + 40151315280.

It is an arithmetic number, because the mean of its divisors is an integer number (93686402313).

Almost surely, 2^321210522212 is an apocalyptic number.

It is an amenable number.

321210522212 is a deficient number, since it is larger than the sum of its proper divisors (240907891666).

321210522212 is a wasteful number, since it uses less digits than its factorization.

321210522212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80302630557 (or 80302630555 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 321210522212 its reverse (212225012123), we get a palindrome (533435534335).

The spelling of 321210522212 in words is "three hundred twenty-one billion, two hundred ten million, five hundred twenty-two thousand, two hundred twelve".