20001022100101 has 4 divisors (see below), whose sum is σ = 22858310971552. Its totient is φ = 17143733228652.

The previous prime is 20001022099987. The next prime is 20001022100113. The reversal of 20001022100101 is 10100122010002.

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 20001022100101 - 2⁹ = 20001022099589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001022140101) 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, 1428644435715 + ... + 1428644435728.

It is an arithmetic number, because the mean of its divisors is an integer number (5714577742888).

Almost surely, 2^{20001022100101} is an apocalyptic number.

It is an amenable number.

20001022100101 is a deficient number, since it is larger than the sum of its proper divisors (2857288871451).

20001022100101 is an equidigital number, since it uses as much as digits as its factorization.

20001022100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857288871450.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20001022100101 its reverse (10100122010002), we get a palindrome (30101144110103).

Subtracting from 20001022100101 its reverse (10100122010002), we obtain a palindrome (9900900090099).

The spelling of 20001022100101 in words is "twenty trillion, one billion, twenty-two million, one hundred thousand, one hundred one".