201221938 has 8 divisors (see below), whose sum is σ = 303413760. Its totient is φ = 100084020.

The previous prime is 201221929. The next prime is 201221939. The reversal of 201221938 is 839122102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (201221939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262998 + ... + 263761.

It is an arithmetic number, because the mean of its divisors is an integer number (37926720).

Almost surely, 2^201221938 is an apocalyptic number.

201221938 is a deficient number, since it is larger than the sum of its proper divisors (102191822).

201221938 is a wasteful number, since it uses less digits than its factorization.

201221938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526952.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 201221938 is about 14185.2718690901. The cubic root of 201221938 is about 585.9921197789.

The spelling of 201221938 in words is "two hundred one million, two hundred twenty-one thousand, nine hundred thirty-eight".