20010122110021 has 8 divisors (see below), whose sum is σ = 20519957302488. Its totient is φ = 19501324224000.

The previous prime is 20010122110009. The next prime is 20010122110037. The reversal of 20010122110021 is 12001122101002.

It can be written as a sum of positive squares in 4 ways, for example, as 1517111987521 + 18493010122500 = 1231711^2 + 4300350^2 .

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 20010122110021 - 2¹³ = 20010122101829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010122109983 and 20010122110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010122110061) 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, 259287540 + ... + 259364701.

It is an arithmetic number, because the mean of its divisors is an integer number (2564994662811).

Almost surely, 2^{20010122110021} is an apocalyptic number.

It is an amenable number.

20010122110021 is a deficient number, since it is larger than the sum of its proper divisors (509835192467).

20010122110021 is an equidigital number, since it uses as much as digits as its factorization.

20010122110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518653223.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20010122110021 its reverse (12001122101002), we get a palindrome (32011244211023).

The spelling of 20010122110021 in words is "twenty trillion, ten billion, one hundred twenty-two million, one hundred ten thousand, twenty-one".