211111110022020 has 192 divisors, whose sum is σ = 641290748507136. Its totient is φ = 51581432770560.

The previous prime is 211111110021961. The next prime is 211111110022049. The reversal of 211111110022020 is 20220011111112.

It is a happy number.

It is a super-3 number, since 3×211111110022020³ (a number of 44 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1151966037 + ... + 1152149283.

It is an arithmetic number, because the mean of its divisors is an integer number (3340055981808).

Almost surely, 2^{211111110022020} is an apocalyptic number.

211111110022020 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 211111110022020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320645374253568).

211111110022020 is an abundant number, since it is smaller than the sum of its proper divisors (430179638485116).

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

211111110022020 is a wasteful number, since it uses less digits than its factorization.

211111110022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194190 (or 194188 counting only the distinct ones).

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

Adding to 211111110022020 its reverse (20220011111112), we get a palindrome (231331121133132).

The spelling of 211111110022020 in words is "two hundred eleven trillion, one hundred eleven billion, one hundred ten million, twenty-two thousand, twenty".