211000111020 has 72 divisors (see below), whose sum is σ = 640567243680. Its totient is φ = 56219788800.

The previous prime is 211000111009. The next prime is 211000111027. The reversal of 211000111020 is 20111000112.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 211000110993 and 211000111011.

It is not an unprimeable number, because it can be changed into a prime (211000111027) 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 23 ways as a sum of consecutive naturals, for example, 271840 + ... + 704199.

Almost surely, 2^211000111020 is an apocalyptic number.

211000111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211000111020 is an abundant number, since it is smaller than the sum of its proper divisors (429567132660).

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

211000111020 is a wasteful number, since it uses less digits than its factorization.

211000111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977255 (or 977250 counting only the distinct ones).

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

Adding to 211000111020 its reverse (20111000112), we get a palindrome (231111111132).

The spelling of 211000111020 in words is "two hundred eleven billion, one hundred eleven thousand, twenty".