20012222121111 has 20 divisors (see below), whose sum is σ = 32612510124744. Its totient is φ = 12128619466800.

The previous prime is 20012222121097. The next prime is 20012222121131. The reversal of 20012222121111 is 11112122221002.

20012222121111 is a `hidden beast` number, since 200 + 1 + 22 + 221 + 211 + 11 = 666.

It is not a de Polignac number, because 20012222121111 - 2⁷ = 20012222120983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012222121131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11230202320 + ... + 11230204101.

Almost surely, 2^{20012222121111} is an apocalyptic number.

20012222121111 is a deficient number, since it is larger than the sum of its proper divisors (12600288003633).

20012222121111 is a wasteful number, since it uses less digits than its factorization.

20012222121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22460406444 (or 22460406435 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20012222121111 its reverse (11112122221002), we get a palindrome (31124344342113).

The spelling of 20012222121111 in words is "twenty trillion, twelve billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred eleven".