201021110110101 has 4 divisors (see below), whose sum is σ = 268028146813472. Its totient is φ = 134014073406732.

The previous prime is 201021110110097. The next prime is 201021110110159. The reversal of 201021110110101 is 101011011120102.

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 201021110110101 - 2² = 201021110110097 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 (201021110114101) 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, 33503518351681 + ... + 33503518351686.

It is an arithmetic number, because the mean of its divisors is an integer number (67007036703368).

Almost surely, 2^{201021110110101} is an apocalyptic number.

It is an amenable number.

201021110110101 is a deficient number, since it is larger than the sum of its proper divisors (67007036703371).

201021110110101 is an equidigital number, since it uses as much as digits as its factorization.

201021110110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67007036703370.

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

Adding to 201021110110101 its reverse (101011011120102), we get a palindrome (302032121230203).

The spelling of 201021110110101 in words is "two hundred one trillion, twenty-one billion, one hundred ten million, one hundred ten thousand, one hundred one".