131040021 has 8 divisors (see below), whose sum is σ = 199680064. Its totient is φ = 74880000.

The previous prime is 131039989. The next prime is 131040023. The reversal of 131040021 is 120040131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131040021 - 2⁵ = 131039989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131039979 and 131040006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131040023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3119980 + ... + 3120021.

It is an arithmetic number, because the mean of its divisors is an integer number (24960008).

Almost surely, 2^131040021 is an apocalyptic number.

It is an amenable number.

131040021 is a deficient number, since it is larger than the sum of its proper divisors (68640043).

131040021 is an equidigital number, since it uses as much as digits as its factorization.

131040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6240011.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 131040021 is about 11447.2713342525. The cubic root of 131040021 is about 507.9270218290.

Adding to 131040021 its reverse (120040131), we get a palindrome (251080152).

The spelling of 131040021 in words is "one hundred thirty-one million, forty thousand, twenty-one".