320121212 has 6 divisors (see below), whose sum is σ = 560212128. Its totient is φ = 160060604.

The previous prime is 320121211. The next prime is 320121247. The reversal of 320121212 is 212121023.

It is a happy number.

320121212 is a modest number, since divided by 121212 gives 320 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320121211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40015148 + ... + 40015155.

It is an arithmetic number, because the mean of its divisors is an integer number (93368688).

Almost surely, 2^320121212 is an apocalyptic number.

It is an amenable number.

320121212 is a deficient number, since it is larger than the sum of its proper divisors (240090916).

320121212 is a wasteful number, since it uses less digits than its factorization.

320121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80030307 (or 80030305 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 320121212 is about 17891.9314776242. The cubic root of 320121212 is about 684.0767301038.

Adding to 320121212 its reverse (212121023), we get a palindrome (532242235).

The spelling of 320121212 in words is "three hundred twenty million, one hundred twenty-one thousand, two hundred twelve".