201220031 has 16 divisors (see below), whose sum is σ = 216345600. Its totient is φ = 186714528.

The previous prime is 201219917. The next prime is 201220043. The reversal of 201220031 is 130022102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201220031 - 2¹⁴ = 201203647 is a prime.

It is a super-2 number, since 2×201220031² = 80979001751281922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201219994 and 201220021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106265 + ... + 108141.

It is an arithmetic number, because the mean of its divisors is an integer number (13521600).

Almost surely, 2^201220031 is an apocalyptic number.

201220031 is a deficient number, since it is larger than the sum of its proper divisors (15125569).

201220031 is a wasteful number, since it uses less digits than its factorization.

201220031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 201220031 is about 14185.2046513260. The cubic root of 201220031 is about 585.9902686049.

Adding to 201220031 its reverse (130022102), we get a palindrome (331242133).

The spelling of 201220031 in words is "two hundred one million, two hundred twenty thousand, thirty-one".