191221341 has 4 divisors (see below), whose sum is σ = 254961792. Its totient is φ = 127480892.

The previous prime is 191221337. The next prime is 191221367. The reversal of 191221341 is 143122191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 191221341 - 2² = 191221337 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191221141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31870221 + ... + 31870226.

It is an arithmetic number, because the mean of its divisors is an integer number (63740448).

Almost surely, 2^191221341 is an apocalyptic number.

It is an amenable number.

191221341 is a deficient number, since it is larger than the sum of its proper divisors (63740451).

191221341 is an equidigital number, since it uses as much as digits as its factorization.

191221341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63740450.

The product of its digits is 432, while the sum is 24.

The square root of 191221341 is about 13828.2804787869. The cubic root of 191221341 is about 576.1188960532.

The spelling of 191221341 in words is "one hundred ninety-one million, two hundred twenty-one thousand, three hundred forty-one".