20021020010121 has 32 divisors (see below), whose sum is σ = 29812159440000. Its totient is φ = 11866693160448.

The previous prime is 20021020010087. The next prime is 20021020010161. The reversal of 20021020010121 is 12101002012002.

It is not a de Polignac number, because 20021020010121 - 2¹⁸ = 20021019747977 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20021020010097 and 20021020010106.

It is not an unprimeable number, because it can be changed into a prime (20021020010161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21178071 + ... + 22103228.

It is an arithmetic number, because the mean of its divisors is an integer number (931629982500).

Almost surely, 2^{20021020010121} is an apocalyptic number.

It is an amenable number.

20021020010121 is a deficient number, since it is larger than the sum of its proper divisors (9791139429879).

20021020010121 is a wasteful number, since it uses less digits than its factorization.

20021020010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43281753.

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

Adding to 20021020010121 its reverse (12101002012002), we get a palindrome (32122022022123).

The spelling of 20021020010121 in words is "twenty trillion, twenty-one billion, twenty million, ten thousand, one hundred twenty-one".