2120031 has 6 divisors (see below), whose sum is σ = 3062280. Its totient is φ = 1413348.

The previous prime is 2120021. The next prime is 2120051. The reversal of 2120031 is 1300212.

It is a happy number.

2120031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2120031 - 2⁶ = 2119967 is a prime.

It is a super-2 number, since 2×2120031² = 8989062881922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 235559 = 2120031 / (2 + 1 + 2 + 0 + 0 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 2119995 and 2120022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117771 + ... + 117788.

It is an arithmetic number, because the mean of its divisors is an integer number (510380).

2^2120031 is an apocalyptic number.

2120031 is a deficient number, since it is larger than the sum of its proper divisors (942249).

2120031 is a wasteful number, since it uses less digits than its factorization.

2120031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235565 (or 235562 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 2120031 is about 1456.0326232609. The cubic root of 2120031 is about 128.4637919251.

Adding to 2120031 its reverse (1300212), we get a palindrome (3420243).

The spelling of 2120031 in words is "two million, one hundred twenty thousand, thirty-one".