191270121 has 16 divisors (see below), whose sum is σ = 293075328. Its totient is φ = 108691200.

The previous prime is 191270083. The next prime is 191270143. The reversal of 191270121 is 121072191.

It is not a de Polignac number, because 191270121 - 2¹⁴ = 191253737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191270091 and 191270100.

It is not an unprimeable number, because it can be changed into a prime (191270161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21360 + ... + 28961.

It is an arithmetic number, because the mean of its divisors is an integer number (18317208).

Almost surely, 2^191270121 is an apocalyptic number.

It is an amenable number.

191270121 is a deficient number, since it is larger than the sum of its proper divisors (101805207).

191270121 is a wasteful number, since it uses less digits than its factorization.

191270121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50512.

The product of its (nonzero) digits is 252, while the sum is 24.

The square root of 191270121 is about 13830.0441430966. The cubic root of 191270121 is about 576.1678806318.

The spelling of 191270121 in words is "one hundred ninety-one million, two hundred seventy thousand, one hundred twenty-one".