20421000101 has 8 divisors (see below), whose sum is σ = 21597669600. Its totient is φ = 19254518640.

The previous prime is 20421000091. The next prime is 20421000137. The reversal of 20421000101 is 10100012402.

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 20421000101 - 2³⁴ = 3241130917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20421000161) 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, 2542886 + ... + 2550903.

It is an arithmetic number, because the mean of its divisors is an integer number (2699708700).

Almost surely, 2^20421000101 is an apocalyptic number.

It is an amenable number.

20421000101 is a deficient number, since it is larger than the sum of its proper divisors (1176669499).

20421000101 is a wasteful number, since it uses less digits than its factorization.

20421000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094019.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20421000101 its reverse (10100012402), we get a palindrome (30521012503).

The spelling of 20421000101 in words is "twenty billion, four hundred twenty-one million, one hundred one", and thus it is an aban number.