20122001191 has 8 divisors (see below), whose sum is σ = 21182686560. Its totient is φ = 19076800512.

The previous prime is 20122001183. The next prime is 20122001213. The reversal of 20122001191 is 19110022102.

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 20122001191 - 2³ = 20122001183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122001591) 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, 3868506 + ... + 3873703.

It is an arithmetic number, because the mean of its divisors is an integer number (2647835820).

Almost surely, 2^20122001191 is an apocalyptic number.

20122001191 is a deficient number, since it is larger than the sum of its proper divisors (1060685369).

20122001191 is a wasteful number, since it uses less digits than its factorization.

20122001191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7742345.

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

Adding to 20122001191 its reverse (19110022102), we get a palindrome (39232023293).

The spelling of 20122001191 in words is "twenty billion, one hundred twenty-two million, one thousand, one hundred ninety-one".