201321031 has 4 divisors (see below), whose sum is σ = 201447000. Its totient is φ = 201195064.

The previous prime is 201321023. The next prime is 201321041. The reversal of 201321031 is 130123102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201321031 - 2³ = 201321023 is a prime.

It is a super-2 number, since 2×201321031² = 81060315045805922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201321011) 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, 60556 + ... + 63793.

It is an arithmetic number, because the mean of its divisors is an integer number (50361750).

Almost surely, 2^201321031 is an apocalyptic number.

201321031 is a deficient number, since it is larger than the sum of its proper divisors (125969).

201321031 is a wasteful number, since it uses less digits than its factorization.

201321031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125968.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 201321031 is about 14188.7642520411. The cubic root of 201321031 is about 586.0882958195.

Adding to 201321031 its reverse (130123102), we get a palindrome (331444133).

The spelling of 201321031 in words is "two hundred one million, three hundred twenty-one thousand, thirty-one".