191111020012001 has 16 divisors (see below), whose sum is σ = 191988391795200. Its totient is φ = 190235737147200.

The previous prime is 191111020011943. The next prime is 191111020012007. The reversal of 191111020012001 is 100210020111191.

It is a cyclic number.

It is not a de Polignac number, because 191111020012001 - 2²² = 191111015817697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191111020012007) 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, 2376105455 + ... + 2376185883.

It is an arithmetic number, because the mean of its divisors is an integer number (11999274487200).

Almost surely, 2^{191111020012001} is an apocalyptic number.

It is an amenable number.

191111020012001 is a deficient number, since it is larger than the sum of its proper divisors (877371783199).

191111020012001 is a wasteful number, since it uses less digits than its factorization.

191111020012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93280.

The product of its (nonzero) digits is 36, while the sum is 20.

Adding to 191111020012001 its reverse (100210020111191), we get a palindrome (291321040123192).

The spelling of 191111020012001 in words is "one hundred ninety-one trillion, one hundred eleven billion, twenty million, twelve thousand, one".