20021012013121 has 8 divisors (see below), whose sum is σ = 22910230489280. Its totient is φ = 17139062012688.

The previous prime is 20021012013109. The next prime is 20021012013131. The reversal of 20021012013121 is 12131021012002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20021012013121 is a prime.

It is a super-3 number, since 3×20021012013121³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021012013095 and 20021012013104.

It is not an unprimeable number, because it can be changed into a prime (20021012013131) 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, 1817113026 + ... + 1817124043.

It is an arithmetic number, because the mean of its divisors is an integer number (2863778811160).

Almost surely, 2^{20021012013121} is an apocalyptic number.

It is an amenable number.

20021012013121 is a deficient number, since it is larger than the sum of its proper divisors (2889218476159).

20021012013121 is an equidigital number, since it uses as much as digits as its factorization.

20021012013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634237863.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20021012013121 its reverse (12131021012002), we get a palindrome (32152033025123).

The spelling of 20021012013121 in words is "twenty trillion, twenty-one billion, twelve million, thirteen thousand, one hundred twenty-one".