211020021210120 has 128 divisors (see below), whose sum is σ = 633817096560000. Its totient is φ = 56204752343040.

The previous prime is 211020021210113. The next prime is 211020021210151. The reversal of 211020021210120 is 21012120020112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211020021210120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 352518831 + ... + 353116929.

It is an arithmetic number, because the mean of its divisors is an integer number (4951696066875).

Almost surely, 2^{211020021210120} is an apocalyptic number.

211020021210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211020021210120 is an abundant number, since it is smaller than the sum of its proper divisors (422797075349880).

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

211020021210120 is a wasteful number, since it uses less digits than its factorization.

211020021210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601623 (or 601619 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211020021210120 its reverse (21012120020112), we get a palindrome (232032141230232).

The spelling of 211020021210120 in words is "two hundred eleven trillion, twenty billion, twenty-one million, two hundred ten thousand, one hundred twenty".