211021111120 has 40 divisors (see below), whose sum is σ = 491416806240. Its totient is φ = 84272062080.

The previous prime is 211021111117. The next prime is 211021111139. The reversal of 211021111120 is 21111120112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 211021111120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2081146 + ... + 2180185.

It is an arithmetic number, because the mean of its divisors is an integer number (12285420156).

Almost surely, 2^211021111120 is an apocalyptic number.

211021111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211021111120 is an abundant number, since it is smaller than the sum of its proper divisors (280395695120).

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

211021111120 is a wasteful number, since it uses less digits than its factorization.

211021111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261963 (or 4261957 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211021111120 its reverse (21111120112), we get a palindrome (232132231232).

The spelling of 211021111120 in words is "two hundred eleven billion, twenty-one million, one hundred eleven thousand, one hundred twenty".