201211228 has 12 divisors (see below), whose sum is σ = 352245712. Its totient is φ = 100569600.

The previous prime is 201211189. The next prime is 201211229. The reversal of 201211228 is 822112102.

201211228 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6553 + ... + 21103.

Almost surely, 2^201211228 is an apocalyptic number.

It is an amenable number.

201211228 is a deficient number, since it is larger than the sum of its proper divisors (151034484).

201211228 is a wasteful number, since it uses less digits than its factorization.

201211228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18012 (or 18010 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 201211228 is about 14184.8943598463. The cubic root of 201211228 is about 585.9817231542.

The spelling of 201211228 in words is "two hundred one million, two hundred eleven thousand, two hundred twenty-eight".