2120211111020 has 48 divisors (see below), whose sum is σ = 4558639000608. Its totient is φ = 827879646720.

The previous prime is 2120211111019. The next prime is 2120211111181. The reversal of 2120211111020 is 201111120212.

It is a junction number, because it is equal to n+sod(n) for n = 2120211110986 and 2120211111004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 763802 + ... + 2196318.

It is an arithmetic number, because the mean of its divisors is an integer number (94971645846).

Almost surely, 2^{2120211111020} is an apocalyptic number.

2120211111020 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 2120211111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2279319500304).

2120211111020 is an abundant number, since it is smaller than the sum of its proper divisors (2438427889588).

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

2120211111020 is a wasteful number, since it uses less digits than its factorization.

2120211111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434290 (or 1434288 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2120211111020 its reverse (201111120212), we get a palindrome (2321322231232).

The spelling of 2120211111020 in words is "two trillion, one hundred twenty billion, two hundred eleven million, one hundred eleven thousand, twenty".