201221432 has 16 divisors (see below), whose sum is σ = 383476200. Its totient is φ = 98961120.

The previous prime is 201221431. The next prime is 201221441. The reversal of 201221432 is 234122102.

It is a super-2 number, since 2×201221432² = 80980129392261248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201221432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205682 + ... + 206657.

Almost surely, 2^201221432 is an apocalyptic number.

It is an amenable number.

201221432 is a deficient number, since it is larger than the sum of its proper divisors (182254768).

201221432 is a wasteful number, since it uses less digits than its factorization.

201221432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412406 (or 412402 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 201221432 is about 14185.2540336788. The cubic root of 201221432 is about 585.9916285928.

Adding to 201221432 its reverse (234122102), we get a palindrome (435343534).

The spelling of 201221432 in words is "two hundred one million, two hundred twenty-one thousand, four hundred thirty-two".