211010020101 has 12 divisors (see below), whose sum is σ = 304817097312. Its totient is φ = 140661879336.

The previous prime is 211010020093. The next prime is 211010020103. The reversal of 211010020101 is 101020010112.

It is a happy number.

It is not a de Polignac number, because 211010020101 - 2³ = 211010020093 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 (211010020103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 838321 + ... + 1060566.

It is an arithmetic number, because the mean of its divisors is an integer number (25401424776).

Almost surely, 2^211010020101 is an apocalyptic number.

It is an amenable number.

211010020101 is a deficient number, since it is larger than the sum of its proper divisors (93807077211).

211010020101 is a wasteful number, since it uses less digits than its factorization.

211010020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911240 (or 1911237 counting only the distinct ones).

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

Adding to 211010020101 its reverse (101020010112), we get a palindrome (312030030213).

The spelling of 211010020101 in words is "two hundred eleven billion, ten million, twenty thousand, one hundred one".