211001100020 has 48 divisors (see below), whose sum is σ = 447021590400. Its totient is φ = 83655461760.

The previous prime is 211001100001. The next prime is 211001100059. The reversal of 211001100020 is 20001100112.

It is a junction number, because it is equal to n+sod(n) for n = 211001099980 and 211001100007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2150186 + ... + 2246174.

It is an arithmetic number, because the mean of its divisors is an integer number (9312949800).

Almost surely, 2^211001100020 is an apocalyptic number.

211001100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211001100020 is an abundant number, since it is smaller than the sum of its proper divisors (236020490380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211001100020 is a wasteful number, since it uses less digits than its factorization.

211001100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96968 (or 96966 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 211001100020 its reverse (20001100112), we get a palindrome (231002200132).

The spelling of 211001100020 in words is "two hundred eleven billion, one million, one hundred thousand, twenty".