20002001220121 has 8 divisors (see below), whose sum is σ = 20004864852960. Its totient is φ = 19999137785952.

The previous prime is 20002001220083. The next prime is 20002001220143. The reversal of 20002001220121 is 12102210020002.

It is a happy number.

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 20002001220121 - 2²¹ = 20001999122969 is a prime.

It is a super-3 number, since 3×20002001220121³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002001220151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397131486 + ... + 397181848.

It is an arithmetic number, because the mean of its divisors is an integer number (2500608106620).

Almost surely, 2^{20002001220121} is an apocalyptic number.

It is an amenable number.

20002001220121 is a deficient number, since it is larger than the sum of its proper divisors (2863632839).

20002001220121 is a wasteful number, since it uses less digits than its factorization.

20002001220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99335.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20002001220121 its reverse (12102210020002), we get a palindrome (32104211240123).

The spelling of 20002001220121 in words is "twenty trillion, two billion, one million, two hundred twenty thousand, one hundred twenty-one".