211001111120220 has 48 divisors (see below), whose sum is σ = 591272375137920. Its totient is φ = 56222271155776.

The previous prime is 211001111120203. The next prime is 211001111120227. The reversal of 211001111120220 is 22021111100112.

It is a happy number.

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 211001111120220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211001111120227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1396542882 + ... + 1396693961.

It is an arithmetic number, because the mean of its divisors is an integer number (12318174482040).

Almost surely, 2^{211001111120220} is an apocalyptic number.

211001111120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211001111120220 is an abundant number, since it is smaller than the sum of its proper divisors (380271264017700).

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

211001111120220 is a wasteful number, since it uses less digits than its factorization.

211001111120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793238114 (or 2793238112 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211001111120220 its reverse (22021111100112), we get a palindrome (233022222220332).

The spelling of 211001111120220 in words is "two hundred eleven trillion, one billion, one hundred eleven million, one hundred twenty thousand, two hundred twenty".