401220212 has 6 divisors (see below), whose sum is σ = 702135378. Its totient is φ = 200610104.

The previous prime is 401220203. The next prime is 401220217. The reversal of 401220212 is 212022104.

It can be written as a sum of positive squares in only one way, i.e., 262310416 + 138909796 = 16196^2 + 11786^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401220217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50152523 + ... + 50152530.

It is an arithmetic number, because the mean of its divisors is an integer number (117022563).

Almost surely, 2^401220212 is an apocalyptic number.

It is an amenable number.

401220212 is a deficient number, since it is larger than the sum of its proper divisors (300915166).

401220212 is a wasteful number, since it uses less digits than its factorization.

401220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100305057 (or 100305055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 401220212 is about 20030.4820710836. The cubic root of 401220212 is about 737.5547557545.

Adding to 401220212 its reverse (212022104), we get a palindrome (613242316).

The spelling of 401220212 in words is "four hundred one million, two hundred twenty thousand, two hundred twelve".