20010020112021 has 4 divisors (see below), whose sum is σ = 26680026816032. Its totient is φ = 13340013408012.

The previous prime is 20010020112011. The next prime is 20010020112037. The reversal of 20010020112021 is 12021102001002.

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 not a de Polignac number, because 20010020112021 - 2²¹ = 20010018014869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010020111988 and 20010020112006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010020112001) 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, 3335003352001 + ... + 3335003352006.

It is an arithmetic number, because the mean of its divisors is an integer number (6670006704008).

Almost surely, 2^{20010020112021} is an apocalyptic number.

It is an amenable number.

20010020112021 is a deficient number, since it is larger than the sum of its proper divisors (6670006704011).

20010020112021 is an equidigital number, since it uses as much as digits as its factorization.

20010020112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670006704010.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20010020112021 its reverse (12021102001002), we get a palindrome (32031122113023).

The spelling of 20010020112021 in words is "twenty trillion, ten billion, twenty million, one hundred twelve thousand, twenty-one".