201421331 has 8 divisors (see below), whose sum is σ = 206300160. Its totient is φ = 196551432.

The previous prime is 201421309. The next prime is 201421343. The reversal of 201421331 is 133124102.

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

It is a cyclic number.

It is not a de Polignac number, because 201421331 - 2²⁶ = 134312467 is a prime.

It is a super-2 number, since 2×201421331² = 81141105163623122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201421351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74306 + ... + 76968.

It is an arithmetic number, because the mean of its divisors is an integer number (25787520).

Almost surely, 2^201421331 is an apocalyptic number.

201421331 is a deficient number, since it is larger than the sum of its proper divisors (4878829).

201421331 is a wasteful number, since it uses less digits than its factorization.

201421331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4465.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 201421331 is about 14192.2982987253. The cubic root of 201421331 is about 586.1856111970.

Adding to 201421331 its reverse (133124102), we get a palindrome (334545433).

The spelling of 201421331 in words is "two hundred one million, four hundred twenty-one thousand, three hundred thirty-one".