2100021004 has 24 divisors (see below), whose sum is σ = 3692854368. Its totient is φ = 1044933120.

The previous prime is 2100020983. The next prime is 2100021013. The reversal of 2100021004 is 4001200012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889794 + ... + 892150.

It is an arithmetic number, because the mean of its divisors is an integer number (153868932).

Almost surely, 2^2100021004 is an apocalyptic number.

It is an amenable number.

2100021004 is a deficient number, since it is larger than the sum of its proper divisors (1592833364).

2100021004 is a wasteful number, since it uses less digits than its factorization.

2100021004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345 (or 3343 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2100021004 is about 45825.9861214137. The cubic root of 2100021004 is about 1280.5834343835.

Adding to 2100021004 its reverse (4001200012), we get a palindrome (6101221016).

The spelling of 2100021004 in words is "two billion, one hundred million, twenty-one thousand, four".