131221199 has 8 divisors (see below), whose sum is σ = 132420288. Its totient is φ = 130027680.

The previous prime is 131221193. The next prime is 131221213. The reversal of 131221199 is 991122131.

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 131221199 - 2⁴ = 131221183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221193) 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, 56234 + ... + 58520.

It is an arithmetic number, because the mean of its divisors is an integer number (16552536).

Almost surely, 2^131221199 is an apocalyptic number.

131221199 is a deficient number, since it is larger than the sum of its proper divisors (1199089).

131221199 is a wasteful number, since it uses less digits than its factorization.

131221199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785.

The product of its digits is 972, while the sum is 29.

The square root of 131221199 is about 11455.1821897340. The cubic root of 131221199 is about 508.1610033307.

The spelling of 131221199 in words is "one hundred thirty-one million, two hundred twenty-one thousand, one hundred ninety-nine".