211001101120020 has 288 divisors, whose sum is σ = 632901717866880. Its totient is φ = 52506657423360.

The previous prime is 211001101119953. The next prime is 211001101120031. The reversal of 211001101120020 is 20021101100112.

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 = 211001101119978 and 211001101120005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1215840655 + ... + 1216014185.

It is an arithmetic number, because the mean of its divisors is an integer number (2197575409260).

Almost surely, 2^{211001101120020} is an apocalyptic number.

211001101120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211001101120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316450858933440).

211001101120020 is an abundant number, since it is smaller than the sum of its proper divisors (421900616746860).

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

211001101120020 is a wasteful number, since it uses less digits than its factorization.

211001101120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174423 (or 174402 counting only the distinct ones).

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

Adding to 211001101120020 its reverse (20021101100112), we get a palindrome (231022202220132).

The spelling of 211001101120020 in words is "two hundred eleven trillion, one billion, one hundred one million, one hundred twenty thousand, twenty".