2101111221020 has 24 divisors (see below), whose sum is σ = 5042666930784. Its totient is φ = 720380990016.

The previous prime is 2101111220977. The next prime is 2101111221047. The reversal of 2101111221020 is 201221111012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 2101111220986 and 2101111221004.

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, 7503968507 + ... + 7503968786.

It is an arithmetic number, because the mean of its divisors is an integer number (210111122116).

Almost surely, 2^{2101111221020} is an apocalyptic number.

2101111221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101111221020 is an abundant number, since it is smaller than the sum of its proper divisors (2941555709764).

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

2101111221020 is a wasteful number, since it uses less digits than its factorization.

2101111221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15007937309 (or 15007937307 counting only the distinct ones).

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

Adding to 2101111221020 its reverse (201221111012), we get a palindrome (2302332332032).

The spelling of 2101111221020 in words is "two trillion, one hundred one billion, one hundred eleven million, two hundred twenty-one thousand, twenty".