20020002001121 has 16 divisors (see below), whose sum is σ = 20364075110400. Its totient is φ = 19678482858960.

The previous prime is 20020002001091. The next prime is 20020002001127. The reversal of 20020002001121 is 12110020002002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20020002001121 - 2⁶ = 20020002001057 is a prime.

It is a super-4 number, since 4×20020002001121⁴ (a number of 54 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020002001127) 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 15 ways as a sum of consecutive naturals, for example, 31128476 + ... + 31765106.

It is an arithmetic number, because the mean of its divisors is an integer number (1272754694400).

Almost surely, 2^{20020002001121} is an apocalyptic number.

It is an amenable number.

20020002001121 is a deficient number, since it is larger than the sum of its proper divisors (344073109279).

20020002001121 is a wasteful number, since it uses less digits than its factorization.

20020002001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638636.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20020002001121 its reverse (12110020002002), we get a palindrome (32130022003123).

The spelling of 20020002001121 in words is "twenty trillion, twenty billion, two million, one thousand, one hundred twenty-one".