131221120199 has 8 divisors (see below), whose sum is σ = 141323752752. Its totient is φ = 121119730560.

The previous prime is 131221120187. The next prime is 131221120211. The reversal of 131221120199 is 991021122131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131221120187) and next prime (131221120211).

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 131221120199 - 2²⁰ = 131220071623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221120099) 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, 85394 + ... + 519359.

It is an arithmetic number, because the mean of its divisors is an integer number (17665469094).

Almost surely, 2^131221120199 is an apocalyptic number.

131221120199 is a deficient number, since it is larger than the sum of its proper divisors (10102632553).

131221120199 is a wasteful number, since it uses less digits than its factorization.

131221120199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621457.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 131221120199 in words is "one hundred thirty-one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred ninety-nine".