20021120012011 has 8 divisors (see below), whose sum is σ = 21207736328544. Its totient is φ = 18835492959360.

The previous prime is 20021120011999. The next prime is 20021120012057. The reversal of 20021120012011 is 11021002112002.

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

It is not a de Polignac number, because 20021120012011 - 2²¹ = 20021117914859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021120011982 and 20021120012000.

It is not an unprimeable number, because it can be changed into a prime (20021120012611) 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, 247274295 + ... + 247355248.

It is an arithmetic number, because the mean of its divisors is an integer number (2650967041068).

Almost surely, 2^{20021120012011} is an apocalyptic number.

20021120012011 is a deficient number, since it is larger than the sum of its proper divisors (1186616316533).

20021120012011 is a wasteful number, since it uses less digits than its factorization.

20021120012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494631941.

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

Adding to 20021120012011 its reverse (11021002112002), we get a palindrome (31042122124013).

The spelling of 20021120012011 in words is "twenty trillion, twenty-one billion, one hundred twenty million, twelve thousand, eleven".