131202021 has 8 divisors (see below), whose sum is σ = 175602240. Its totient is φ = 87134912.

The previous prime is 131202007. The next prime is 131202041. The reversal of 131202021 is 120202131.

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

It is a cyclic number.

It is not a de Polignac number, because 131202021 - 2⁷ = 131201893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131201988 and 131202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131202041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82356 + ... + 83933.

It is an arithmetic number, because the mean of its divisors is an integer number (21950280).

Almost surely, 2^131202021 is an apocalyptic number.

It is an amenable number.

131202021 is a deficient number, since it is larger than the sum of its proper divisors (44400219).

131202021 is a wasteful number, since it uses less digits than its factorization.

131202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166555.

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

The square root of 131202021 is about 11454.3450707581. The cubic root of 131202021 is about 508.1362461862.

Adding to 131202021 its reverse (120202131), we get a palindrome (251404152).

The spelling of 131202021 in words is "one hundred thirty-one million, two hundred two thousand, twenty-one".