211121101022020 has 96 divisors (see below), whose sum is σ = 510361837751808. Its totient is φ = 71861461327872.

The previous prime is 211121101021939. The next prime is 211121101022053. The reversal of 211121101022020 is 20220101121112.

It is a junction number, because it is equal to n+sod(n) for n = 211121101021985 and 211121101022003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5136654 + ... + 21180826.

It is an arithmetic number, because the mean of its divisors is an integer number (5316269143248).

Almost surely, 2^{211121101022020} is an apocalyptic number.

211121101022020 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 211121101022020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255180918875904).

211121101022020 is an abundant number, since it is smaller than the sum of its proper divisors (299240736729788).

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

211121101022020 is a wasteful number, since it uses less digits than its factorization.

211121101022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16044869 (or 16044867 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211121101022020 its reverse (20220101121112), we get a palindrome (231341202143132).

The spelling of 211121101022020 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred one million, twenty-two thousand, twenty".