120200031 has 40 divisors (see below), whose sum is σ = 206300160. Its totient is φ = 68321232.

The previous prime is 120200029. The next prime is 120200033. The reversal of 120200031 is 130002021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (120200029) and next prime (120200033).

It is not a de Polignac number, because 120200031 - 2¹ = 120200029 is a prime.

It is a super-2 number, since 2×120200031² = 28896094904801922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 120199986 and 120200022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120200033) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 135070 + ... + 135956.

It is an arithmetic number, because the mean of its divisors is an integer number (5157504).

Almost surely, 2^120200031 is an apocalyptic number.

120200031 is a deficient number, since it is larger than the sum of its proper divisors (86100129).

120200031 is an equidigital number, since it uses as much as digits as its factorization.

120200031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1136 counting only the distinct ones).

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

The square root of 120200031 is about 10963.5774727048. The cubic root of 120200031 is about 493.5163287619.

Adding to 120200031 its reverse (130002021), we get a palindrome (250202052).

The spelling of 120200031 in words is "one hundred twenty million, two hundred thousand, thirty-one".