20021000110121 has 8 divisors (see below), whose sum is σ = 20068619832384. Its totient is φ = 19973407064400.

The previous prime is 20021000110117. The next prime is 20021000110141. The reversal of 20021000110121 is 12101100012002.

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 20021000110121 - 2² = 20021000110117 is a prime.

It is a super-3 number, since 3×20021000110121³ (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 (20021000110141) 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, 5165930 + ... + 8168771.

It is an arithmetic number, because the mean of its divisors is an integer number (2508577479048).

Almost surely, 2^{20021000110121} is an apocalyptic number.

It is an amenable number.

20021000110121 is a deficient number, since it is larger than the sum of its proper divisors (47619722263).

20021000110121 is a wasteful number, since it uses less digits than its factorization.

20021000110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13338271.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20021000110121 its reverse (12101100012002), we get a palindrome (32122100122123).

The spelling of 20021000110121 in words is "twenty trillion, twenty-one billion, one hundred ten thousand, one hundred twenty-one".