2101405100 has 72 divisors (see below), whose sum is σ = 4625797680. Its totient is φ = 828529920.

The previous prime is 2101405067. The next prime is 2101405127. The reversal of 2101405100 is 15041012.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2963546 + ... + 2964254.

It is an arithmetic number, because the mean of its divisors is an integer number (64247190).

Almost surely, 2^2101405100 is an apocalyptic number.

2101405100 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 2101405100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2312898840).

2101405100 is an abundant number, since it is smaller than the sum of its proper divisors (2524392580).

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

2101405100 is a wasteful number, since it uses less digits than its factorization.

2101405100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1100 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 2101405100 is about 45841.0852838368. The cubic root of 2101405100 is about 1280.8647111182.

Adding to 2101405100 its reverse (15041012), we get a palindrome (2116446112).

The spelling of 2101405100 in words is "two billion, one hundred one million, four hundred five thousand, one hundred".