20011221030011 has 8 divisors (see below), whose sum is σ = 20437168886784. Its totient is φ = 19585280556520.

The previous prime is 20011221029971. The next prime is 20011221030013. The reversal of 20011221030011 is 11003012211002.

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 20011221030011 - 2²⁶ = 20011153921147 is a prime.

It is a super-2 number, since 2×20011221030011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011221030013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3815396 + ... + 7387806.

It is an arithmetic number, because the mean of its divisors is an integer number (2554646110848).

Almost surely, 2^{20011221030011} is an apocalyptic number.

20011221030011 is a deficient number, since it is larger than the sum of its proper divisors (425947856773).

20011221030011 is a wasteful number, since it uses less digits than its factorization.

20011221030011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691641.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20011221030011 its reverse (11003012211002), we get a palindrome (31014233241013).

The spelling of 20011221030011 in words is "twenty trillion, eleven billion, two hundred twenty-one million, thirty thousand, eleven".