20212220202111 has 72 divisors (see below), whose sum is σ = 35885438709120. Its totient is φ = 10900348218144.

The previous prime is 20212220202107. The next prime is 20212220202127. The reversal of 20212220202111 is 11120202221202.

It is a happy number.

20212220202111 is a `hidden beast` number, since 2 + 0 + 212 + 220 + 20 + 211 + 1 = 666.

It is not a de Polignac number, because 20212220202111 - 2² = 20212220202107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212220202511) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2382345 + ... + 6789698.

It is an arithmetic number, because the mean of its divisors is an integer number (498408870960).

Almost surely, 2^{20212220202111} is an apocalyptic number.

20212220202111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20212220202111 is a deficient number, since it is larger than the sum of its proper divisors (15673218507009).

20212220202111 is a wasteful number, since it uses less digits than its factorization.

20212220202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9172345 (or 9172335 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20212220202111 its reverse (11120202221202), we get a palindrome (31332422423313).

The spelling of 20212220202111 in words is "twenty trillion, two hundred twelve billion, two hundred twenty million, two hundred two thousand, one hundred eleven".