20211100101 has 32 divisors (see below), whose sum is σ = 31662167040. Its totient is φ = 12721363200.

The previous prime is 20211100099. The next prime is 20211100103. The reversal of 20211100101 is 10100111202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20211100099) and next prime (20211100103).

It is not a de Polignac number, because 20211100101 - 2¹ = 20211100099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211100103) 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, 260160 + ... + 328793.

It is an arithmetic number, because the mean of its divisors is an integer number (989442720).

Almost surely, 2^20211100101 is an apocalyptic number.

It is an amenable number.

20211100101 is a deficient number, since it is larger than the sum of its proper divisors (11451066939).

20211100101 is a wasteful number, since it uses less digits than its factorization.

20211100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589034 (or 589028 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20211100101 its reverse (10100111202), we get a palindrome (30311211303).

The spelling of 20211100101 in words is "twenty billion, two hundred eleven million, one hundred thousand, one hundred one".