191222011 has 8 divisors (see below), whose sum is σ = 192389120. Its totient is φ = 190059048.

The previous prime is 191221993. The next prime is 191222051. The reversal of 191222011 is 110222191.

It is a happy number.

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 191222011 - 2¹⁹ = 190697723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191222011.

It is not an unprimeable number, because it can be changed into a prime (191222051) 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 7 ways as a sum of consecutive naturals, for example, 148870 + ... + 150148.

It is an arithmetic number, because the mean of its divisors is an integer number (24048640).

Almost surely, 2^191222011 is an apocalyptic number.

191222011 is a deficient number, since it is larger than the sum of its proper divisors (1167109).

191222011 is a wasteful number, since it uses less digits than its factorization.

191222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 191222011 is about 13828.3047044820. The cubic root of 191222011 is about 576.1195689195.

The spelling of 191222011 in words is "one hundred ninety-one million, two hundred twenty-two thousand, eleven".