20112220122211 has 16 divisors (see below), whose sum is σ = 24205461372160. Its totient is φ = 16324768810080.

The previous prime is 20112220122191. The next prime is 20112220122223. The reversal of 20112220122211 is 11222102221102.

It is a cyclic number.

It is not a de Polignac number, because 20112220122211 - 2²¹ = 20112218025059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112220122251) 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, 31903380 + ... + 32527681.

It is an arithmetic number, because the mean of its divisors is an integer number (1512841335760).

Almost surely, 2^{20112220122211} is an apocalyptic number.

20112220122211 is a deficient number, since it is larger than the sum of its proper divisors (4093241249949).

20112220122211 is a wasteful number, since it uses less digits than its factorization.

20112220122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64433434.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20112220122211 its reverse (11222102221102), we get a palindrome (31334322343313).

The spelling of 20112220122211 in words is "twenty trillion, one hundred twelve billion, two hundred twenty million, one hundred twenty-two thousand, two hundred eleven".