201111111020001 has 64 divisors (see below), whose sum is σ = 338988850679808. Its totient is φ = 103201158129408.

The previous prime is 201111111019969. The next prime is 201111111020009. The reversal of 201111111020001 is 100020111111102.

It is not a de Polignac number, because 201111111020001 - 2⁵ = 201111111019969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201111111020009) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 83284300 + ... + 85665026.

It is an arithmetic number, because the mean of its divisors is an integer number (5296700791872).

Almost surely, 2^{201111111020001} is an apocalyptic number.

201111111020001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201111111020001 is a deficient number, since it is larger than the sum of its proper divisors (137877739659807).

201111111020001 is a wasteful number, since it uses less digits than its factorization.

201111111020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389150.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 201111111020001 its reverse (100020111111102), we get a palindrome (301131222131103).

The spelling of 201111111020001 in words is "two hundred one trillion, one hundred eleven billion, one hundred eleven million, twenty thousand, one".