201020111210001 has 4 divisors (see below), whose sum is σ = 268026814946672. Its totient is φ = 134013407473332.

The previous prime is 201020111209979. The next prime is 201020111210047. The reversal of 201020111210001 is 100012111020102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 201020111210001 - 2⁵ = 201020111209969 is a prime.

It is a super-2 number, since 2×201020111210001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201020111210101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33503351868331 + ... + 33503351868336.

It is an arithmetic number, because the mean of its divisors is an integer number (67006703736668).

Almost surely, 2^{201020111210001} is an apocalyptic number.

It is an amenable number.

201020111210001 is a deficient number, since it is larger than the sum of its proper divisors (67006703736671).

201020111210001 is an equidigital number, since it uses as much as digits as its factorization.

201020111210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67006703736670.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 201020111210001 its reverse (100012111020102), we get a palindrome (301032222230103).

The spelling of 201020111210001 in words is "two hundred one trillion, twenty billion, one hundred eleven million, two hundred ten thousand, one".