2101111102020 has 48 divisors (see below), whose sum is σ = 6723555527808. Its totient is φ = 480253966080.

The previous prime is 2101111102003. The next prime is 2101111102031. The reversal of 2101111102020 is 202011111012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2101111101987 and 2101111102005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2501322321 + ... + 2501323160.

It is an arithmetic number, because the mean of its divisors is an integer number (140074073496).

Almost surely, 2^{2101111102020} is an apocalyptic number.

2101111102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101111102020 is an abundant number, since it is smaller than the sum of its proper divisors (4622444425788).

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

2101111102020 is a wasteful number, since it uses less digits than its factorization.

2101111102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5002645500 (or 5002645498 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2101111102020 its reverse (202011111012), we get a palindrome (2303122213032).

It can be divided in two parts, 210111 and 1102020, that added together give a palindrome (1312131).

The spelling of 2101111102020 in words is "two trillion, one hundred one billion, one hundred eleven million, one hundred two thousand, twenty".