2101204400 has 60 divisors (see below), whose sum is σ = 5053922064. Its totient is φ = 839520000.

The previous prime is 2101204381. The next prime is 2101204409. The reversal of 2101204400 is 44021012.

It is not an unprimeable number, because it can be changed into a prime (2101204409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421925 + ... + 426875.

Almost surely, 2^2101204400 is an apocalyptic number.

2101204400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101204400 is an abundant number, since it is smaller than the sum of its proper divisors (2952717664).

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

2101204400 is a wasteful number, since it uses less digits than its factorization.

2101204400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6030 (or 6019 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2101204400 is about 45838.8961472678. The cubic root of 2101204400 is about 1280.8239324138.

Adding to 2101204400 its reverse (44021012), we get a palindrome (2145225412).

The spelling of 2101204400 in words is "two billion, one hundred one million, two hundred four thousand, four hundred".