20421002214101 has 4 divisors (see below), whose sum is σ = 20446182242304. Its totient is φ = 20395822185900.

The previous prime is 20421002214091. The next prime is 20421002214143. The reversal of 20421002214101 is 10141220012402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20421002214101 - 2³⁰ = 20419928472277 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 (20421002217101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12590012885 + ... + 12590014506.

It is an arithmetic number, because the mean of its divisors is an integer number (5111545560576).

Almost surely, 2^{20421002214101} is an apocalyptic number.

It is an amenable number.

20421002214101 is a deficient number, since it is larger than the sum of its proper divisors (25180028203).

20421002214101 is an equidigital number, since it uses as much as digits as its factorization.

20421002214101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25180028202.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20421002214101 its reverse (10141220012402), we get a palindrome (30562222226503).

The spelling of 20421002214101 in words is "twenty trillion, four hundred twenty-one billion, two million, two hundred fourteen thousand, one hundred one".