20020121012011 has 16 divisors (see below), whose sum is σ = 20218358806528. Its totient is φ = 19822775544000.

The previous prime is 20020121011987. The next prime is 20020121012113. The reversal of 20020121012011 is 11021012102002.

It is a cyclic number.

It is not a de Polignac number, because 20020121012011 - 2¹³ = 20020121003819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020121011982 and 20020121012000.

It is not an unprimeable number, because it can be changed into a prime (20020121019011) 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, 222220471 + ... + 222310543.

It is an arithmetic number, because the mean of its divisors is an integer number (1263647425408).

Almost surely, 2^{20020121012011} is an apocalyptic number.

20020121012011 is a deficient number, since it is larger than the sum of its proper divisors (198237794517).

20020121012011 is a wasteful number, since it uses less digits than its factorization.

20020121012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95002.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20020121012011 its reverse (11021012102002), we get a palindrome (31041133114013).

The spelling of 20020121012011 in words is "twenty trillion, twenty billion, one hundred twenty-one million, twelve thousand, eleven".