20013113101421 has 4 divisors (see below), whose sum is σ = 21832487019744. Its totient is φ = 18193739183100.

The previous prime is 20013113101403. The next prime is 20013113101427. The reversal of 20013113101421 is 12410131131002.

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 20013113101421 - 2⁶ = 20013113101357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20013113101393 and 20013113101402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013113101427) 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, 909686959145 + ... + 909686959166.

It is an arithmetic number, because the mean of its divisors is an integer number (5458121754936).

Almost surely, 2^{20013113101421} is an apocalyptic number.

It is an amenable number.

20013113101421 is a deficient number, since it is larger than the sum of its proper divisors (1819373918323).

20013113101421 is a wasteful number, since it uses less digits than its factorization.

20013113101421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819373918322.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20013113101421 its reverse (12410131131002), we get a palindrome (32423244232423).

The spelling of 20013113101421 in words is "twenty trillion, thirteen billion, one hundred thirteen million, one hundred one thousand, four hundred twenty-one".