201020100021101 has 4 divisors (see below), whose sum is σ = 201021395383872. Its totient is φ = 201018804658332.

The previous prime is 201020100021071. The next prime is 201020100021127. The reversal of 201020100021101 is 101120001020102.

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 a cyclic number.

It is not a de Polignac number, because 201020100021101 - 2³⁰ = 201019026279277 is a prime.

It is a super-2 number, since 2×201020100021101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020100021701) 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, 647448581 + ... + 647758986.

It is an arithmetic number, because the mean of its divisors is an integer number (50255348845968).

Almost surely, 2^{201020100021101} is an apocalyptic number.

It is an amenable number.

201020100021101 is a deficient number, since it is larger than the sum of its proper divisors (1295362771).

201020100021101 is a wasteful number, since it uses less digits than its factorization.

201020100021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295362770.

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

Adding to 201020100021101 its reverse (101120001020102), we get a palindrome (302140101041203).

Subtracting from 201020100021101 its reverse (101120001020102), we obtain a palindrome (99900099000999).

The spelling of 201020100021101 in words is "two hundred one trillion, twenty billion, one hundred million, twenty-one thousand, one hundred one".