20050103012021 has 4 divisors (see below), whose sum is σ = 20069180180544. Its totient is φ = 20031025843500.

The previous prime is 20050103011999. The next prime is 20050103012033. The reversal of 20050103012021 is 12021030105002.

It is a happy number.

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 20050103012021 - 2⁶ = 20050103011957 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 (20050103012081) 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, 9538582685 + ... + 9538584786.

It is an arithmetic number, because the mean of its divisors is an integer number (5017295045136).

Almost surely, 2^{20050103012021} is an apocalyptic number.

It is an amenable number.

20050103012021 is a deficient number, since it is larger than the sum of its proper divisors (19077168523).

20050103012021 is a wasteful number, since it uses less digits than its factorization.

20050103012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19077168522.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 20050103012021 its reverse (12021030105002), we get a palindrome (32071133117023).

The spelling of 20050103012021 in words is "twenty trillion, fifty billion, one hundred three million, twelve thousand, twenty-one".