20210012013121 has 16 divisors (see below), whose sum is σ = 23846940282880. Its totient is φ = 16760750642640.

The previous prime is 20210012013119. The next prime is 20210012013131. The reversal of 20210012013121 is 12131021001202.

It is a cyclic number.

It is not a de Polignac number, because 20210012013121 - 2¹ = 20210012013119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210012013095 and 20210012013104.

It is not an unprimeable number, because it can be changed into a prime (20210012013131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8106951 + ... + 10302556.

It is an arithmetic number, because the mean of its divisors is an integer number (1490433767680).

Almost surely, 2^{20210012013121} is an apocalyptic number.

It is an amenable number.

20210012013121 is a deficient number, since it is larger than the sum of its proper divisors (3636928269759).

20210012013121 is a wasteful number, since it uses less digits than its factorization.

20210012013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18414604.

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

Adding to 20210012013121 its reverse (12131021001202), we get a palindrome (32341033014323).

The spelling of 20210012013121 in words is "twenty trillion, two hundred ten billion, twelve million, thirteen thousand, one hundred twenty-one".