2100423021 has 8 divisors (see below), whose sum is σ = 2865693600. Its totient is φ = 1367717232.

The previous prime is 2100422977. The next prime is 2100423041. The reversal of 2100423021 is 1203240012.

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

It is not a de Polignac number, because 2100423021 - 2⁹ = 2100422509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100423041) 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 7 ways as a sum of consecutive naturals, for example, 8141046 + ... + 8141303.

It is an arithmetic number, because the mean of its divisors is an integer number (358211700).

Almost surely, 2^2100423021 is an apocalyptic number.

It is an amenable number.

2100423021 is a deficient number, since it is larger than the sum of its proper divisors (765270579).

2100423021 is a wasteful number, since it uses less digits than its factorization.

2100423021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16282395.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2100423021 is about 45830.3722546523. The cubic root of 2100423021 is about 1280.6651452270.

Adding to 2100423021 its reverse (1203240012), we get a palindrome (3303663033).

The spelling of 2100423021 in words is "two billion, one hundred million, four hundred twenty-three thousand, twenty-one".