2102111020 has 12 divisors (see below), whose sum is σ = 4414433184. Its totient is φ = 840844400.

The previous prime is 2102111017. The next prime is 2102111071. The reversal of 2102111020 is 201112012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2102110988 and 2102111006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52552756 + ... + 52552795.

It is an arithmetic number, because the mean of its divisors is an integer number (367869432).

Almost surely, 2^2102111020 is an apocalyptic number.

2102111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102111020 is an abundant number, since it is smaller than the sum of its proper divisors (2312322164).

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

2102111020 is a wasteful number, since it uses less digits than its factorization.

2102111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105105560 (or 105105558 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2102111020 is about 45848.7842805019. The cubic root of 2102111020 is about 1281.0081210028.

Adding to 2102111020 its reverse (201112012), we get a palindrome (2303223032).

It can be divided in two parts, 21021 and 11020, that added together give a square (32041 = 179²).

The spelling of 2102111020 in words is "two billion, one hundred two million, one hundred eleven thousand, twenty".