20011121102211 has 8 divisors (see below), whose sum is σ = 26702194183440. Its totient is φ = 13330397711232.

The previous prime is 20011121102209. The next prime is 20011121102233. The reversal of 20011121102211 is 11220112111002.

It is a happy number.

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

It is not a de Polignac number, because 20011121102211 - 2¹ = 20011121102209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011121102611) 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, 2587418050 + ... + 2587425783.

It is an arithmetic number, because the mean of its divisors is an integer number (3337774272930).

Almost surely, 2^{20011121102211} is an apocalyptic number.

20011121102211 is a deficient number, since it is larger than the sum of its proper divisors (6691073081229).

20011121102211 is a wasteful number, since it uses less digits than its factorization.

20011121102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5174845125.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20011121102211 its reverse (11220112111002), we get a palindrome (31231233213213).

The spelling of 20011121102211 in words is "twenty trillion, eleven billion, one hundred twenty-one million, one hundred two thousand, two hundred eleven".