201201120191 has 4 divisors (see below), whose sum is σ = 201341527152. Its totient is φ = 201060713232.

The previous prime is 201201120173. The next prime is 201201120251. The reversal of 201201120191 is 191021102102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201201120191 - 2²² = 201196925887 is a prime.

It is a super-2 number, since 2×201201120191² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201120091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70201331 + ... + 70204196.

It is an arithmetic number, because the mean of its divisors is an integer number (50335381788).

Almost surely, 2^201201120191 is an apocalyptic number.

201201120191 is a deficient number, since it is larger than the sum of its proper divisors (140406961).

201201120191 is a wasteful number, since it uses less digits than its factorization.

201201120191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140406960.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 201201120191 its reverse (191021102102), we get a palindrome (392222222293).

The spelling of 201201120191 in words is "two hundred one billion, two hundred one million, one hundred twenty thousand, one hundred ninety-one".