2100454021 has 8 divisors (see below), whose sum is σ = 2176282080. Its totient is φ = 2024852592.

The previous prime is 2100454019. The next prime is 2100454049. The reversal of 2100454021 is 1204540012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100454021 - 2¹ = 2100454019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2100454021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100454621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37675 + ... + 74968.

It is an arithmetic number, because the mean of its divisors is an integer number (272035260).

Almost surely, 2^2100454021 is an apocalyptic number.

It is an amenable number.

2100454021 is a deficient number, since it is larger than the sum of its proper divisors (75828059).

2100454021 is a wasteful number, since it uses less digits than its factorization.

2100454021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113315.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2100454021 is about 45830.7104570723. The cubic root of 2100454021 is about 1280.6714456125.

Adding to 2100454021 its reverse (1204540012), we get a palindrome (3304994033).

The spelling of 2100454021 in words is "two billion, one hundred million, four hundred fifty-four thousand, twenty-one".