200120031 has 32 divisors (see below), whose sum is σ = 304819200. Its totient is φ = 129697920.

The previous prime is 200120029. The next prime is 200120069. The reversal of 200120031 is 130021002.

It is a happy number.

It is not a de Polignac number, because 200120031 - 2¹ = 200120029 is a prime.

It is a super-2 number, since 2×200120031² = 80096053614881922, 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 = 200119995 and 200120022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200120131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226711 + ... + 227591.

It is an arithmetic number, because the mean of its divisors is an integer number (9525600).

Almost surely, 2^200120031 is an apocalyptic number.

200120031 is a deficient number, since it is larger than the sum of its proper divisors (104699169).

200120031 is a wasteful number, since it uses less digits than its factorization.

200120031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1110 counting only the distinct ones).

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

The square root of 200120031 is about 14146.3787238996. The cubic root of 200120031 is about 584.9205151705.

Adding to 200120031 its reverse (130021002), we get a palindrome (330141033).

The spelling of 200120031 in words is "two hundred million, one hundred twenty thousand, thirty-one".