2111311222020 has 576 divisors, whose sum is σ = 8831222539776. Its totient is φ = 394020495360.

The previous prime is 2111311221991. The next prime is 2111311222063. The reversal of 2111311222020 is 202221131112.

2111311222020 is a `hidden beast` number, since 2 + 111 + 311 + 2 + 220 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2111311221984 and 2111311222002.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6508312 + ... + 6825008.

It is an arithmetic number, because the mean of its divisors is an integer number (15331983576).

Almost surely, 2^{2111311222020} is an apocalyptic number.

2111311222020 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 2111311222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4415611269888).

2111311222020 is an abundant number, since it is smaller than the sum of its proper divisors (6719911317756).

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

2111311222020 is a wasteful number, since it uses less digits than its factorization.

2111311222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316780 (or 316775 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2111311222020 its reverse (202221131112), we get a palindrome (2313532353132).

The spelling of 2111311222020 in words is "two trillion, one hundred eleven billion, three hundred eleven million, two hundred twenty-two thousand, twenty".