211111201020 has 48 divisors (see below), whose sum is σ = 592272767520. Its totient is φ = 56185710336.

The previous prime is 211111201019. The next prime is 211111201027. The reversal of 211111201020 is 20102111112.

211111201020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211111201020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 211111200987 and 211111201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111201027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3425767 + ... + 3486846.

It is an arithmetic number, because the mean of its divisors is an integer number (12339015990).

Almost surely, 2^211111201020 is an apocalyptic number.

211111201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211111201020 is an abundant number, since it is smaller than the sum of its proper divisors (381161566500).

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

211111201020 is a wasteful number, since it uses less digits than its factorization.

211111201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6913134 (or 6913132 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 211111201020 its reverse (20102111112), we get a palindrome (231213312132).

The spelling of 211111201020 in words is "two hundred eleven billion, one hundred eleven million, two hundred one thousand, twenty".