2111121021020 has 24 divisors (see below), whose sum is σ = 4836386339568. Its totient is φ = 767680371200.

The previous prime is 2111121021001. The next prime is 2111121021047. The reversal of 2111121021020 is 201201211112.

It is a junction number, because it is equal to n+sod(n) for n = 2111121020986 and 2111121021004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4798002101 + ... + 4798002540.

It is an arithmetic number, because the mean of its divisors is an integer number (201516097482).

Almost surely, 2^{2111121021020} is an apocalyptic number.

2111121021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111121021020 is an abundant number, since it is smaller than the sum of its proper divisors (2725265318548).

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

2111121021020 is a wasteful number, since it uses less digits than its factorization.

2111121021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9596004661 (or 9596004659 counting only the distinct ones).

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

Adding to 2111121021020 its reverse (201201211112), we get a palindrome (2312322232132).

The spelling of 2111121021020 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, twenty-one thousand, twenty".