20011111022211 has 8 divisors (see below), whose sum is σ = 26681515295424. Its totient is φ = 13340723715240.

The previous prime is 20011111022131. The next prime is 20011111022233. The reversal of 20011111022211 is 11222011111002.

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 20011111022211 - 2³¹ = 20008963538563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011111042211) 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, 1172161 + ... + 6433986.

It is an arithmetic number, because the mean of its divisors is an integer number (3335189411928).

Almost surely, 2^{20011111022211} is an apocalyptic number.

20011111022211 is a deficient number, since it is larger than the sum of its proper divisors (6670404273213).

20011111022211 is an equidigital number, since it uses as much as digits as its factorization.

20011111022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8483121.

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

Adding to 20011111022211 its reverse (11222011111002), we get a palindrome (31233122133213).

The spelling of 20011111022211 in words is "twenty trillion, eleven billion, one hundred eleven million, twenty-two thousand, two hundred eleven".