2021100421 has 8 divisors (see below), whose sum is σ = 2044842624. Its totient is φ = 1997494800.

The previous prime is 2021100409. The next prime is 2021100461. The reversal of 2021100421 is 1240011202.

It is a happy number.

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 2021100421 - 2¹⁹ = 2020576133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021100461) by changing a digit.

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, 4225 + ... + 63718.

It is an arithmetic number, because the mean of its divisors is an integer number (255605328).

Almost surely, 2^2021100421 is an apocalyptic number.

It is an amenable number.

2021100421 is a deficient number, since it is larger than the sum of its proper divisors (23742203).

2021100421 is a wasteful number, since it uses less digits than its factorization.

2021100421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68291.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2021100421 is about 44956.6504646420. The cubic root of 2021100421 is about 1264.3363693549.

Adding to 2021100421 its reverse (1240011202), we get a palindrome (3261111623).

The spelling of 2021100421 in words is "two billion, twenty-one million, one hundred thousand, four hundred twenty-one".