120691031 has 4 divisors (see below), whose sum is σ = 122047200. Its totient is φ = 119334864.

The previous prime is 120691027. The next prime is 120691033. The reversal of 120691031 is 130196021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120691031 - 2² = 120691027 is a prime.

It is a super-3 number, since 3×120691031³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120690988 and 120691006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120691033) 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, 677951 + ... + 678128.

It is an arithmetic number, because the mean of its divisors is an integer number (30511800).

Almost surely, 2^120691031 is an apocalyptic number.

120691031 is a deficient number, since it is larger than the sum of its proper divisors (1356169).

120691031 is an equidigital number, since it uses as much as digits as its factorization.

120691031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356168.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 120691031 is about 10985.9469778440. The cubic root of 120691031 is about 494.1873971450.

The spelling of 120691031 in words is "one hundred twenty million, six hundred ninety-one thousand, thirty-one".