201020020111001 has 32 divisors (see below), whose sum is σ = 261998401996800. Its totient is φ = 149672617307136.

The previous prime is 201020020110979. The next prime is 201020020111007. The reversal of 201020020111001 is 100111020020102.

It is not a de Polignac number, because 201020020111001 - 2⁶ = 201020020110937 is a prime.

It is a super-2 number, since 2×201020020111001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201020020111007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2528120 + ... + 20209686.

It is an arithmetic number, because the mean of its divisors is an integer number (8187450062400).

Almost surely, 2^{201020020111001} is an apocalyptic number.

It is an amenable number.

201020020111001 is a deficient number, since it is larger than the sum of its proper divisors (60978381885799).

201020020111001 is a wasteful number, since it uses less digits than its factorization.

201020020111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17688953.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201020020111001 its reverse (100111020020102), we get a palindrome (301131040131103).

The spelling of 201020020111001 in words is "two hundred one trillion, twenty billion, twenty million, one hundred eleven thousand, one".