211100020101 has 16 divisors (see below), whose sum is σ = 312759235200. Its totient is φ = 140725037664.

The previous prime is 211100020069. The next prime is 211100020111. The reversal of 211100020101 is 101020001112.

It is a happy number.

It is not a de Polignac number, because 211100020101 - 2⁵ = 211100020069 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 (211100020111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253440 + ... + 697446.

It is an arithmetic number, because the mean of its divisors is an integer number (19547452200).

Almost surely, 2^211100020101 is an apocalyptic number.

It is an amenable number.

211100020101 is a deficient number, since it is larger than the sum of its proper divisors (101659215099).

211100020101 is a wasteful number, since it uses less digits than its factorization.

211100020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461625 (or 461619 counting only the distinct ones).

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

Adding to 211100020101 its reverse (101020001112), we get a palindrome (312120021213).

The spelling of 211100020101 in words is "two hundred eleven billion, one hundred million, twenty thousand, one hundred one".