120100031 has 4 divisors (see below), whose sum is σ = 120964200. Its totient is φ = 119235864.

The previous prime is 120100027. The next prime is 120100051. The reversal of 120100031 is 130001021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130001021 = 19 ⋅6842159.

It is a cyclic number.

It is not a de Polignac number, because 120100031 - 2² = 120100027 is a prime.

It is a super-2 number, since 2×120100031² = 28848034892401922, 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 = 120099991 and 120100018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120100051) 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, 431876 + ... + 432153.

It is an arithmetic number, because the mean of its divisors is an integer number (30241050).

Almost surely, 2^120100031 is an apocalyptic number.

120100031 is a deficient number, since it is larger than the sum of its proper divisors (864169).

120100031 is an equidigital number, since it uses as much as digits as its factorization.

120100031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864168.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 120100031 is about 10959.0159685986. The cubic root of 120100031 is about 493.3794310569.

Adding to 120100031 its reverse (130001021), we get a palindrome (250101052).

The spelling of 120100031 in words is "one hundred twenty million, one hundred thousand, thirty-one".