20012212212111 has 32 divisors (see below), whose sum is σ = 33900284651520. Its totient is φ = 11429753601312.

The previous prime is 20012212212073. The next prime is 20012212212131. The reversal of 20012212212111 is 11121221221002.

20012212212111 is a `hidden beast` number, since 200 + 1 + 221 + 221 + 21 + 1 + 1 = 666.

It is not a de Polignac number, because 20012212212111 - 2⁷ = 20012212211983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012212212131) 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 31 ways as a sum of consecutive naturals, for example, 26460535 + ... + 27206328.

It is an arithmetic number, because the mean of its divisors is an integer number (1059383895360).

Almost surely, 2^{20012212212111} is an apocalyptic number.

20012212212111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20012212212111 is a deficient number, since it is larger than the sum of its proper divisors (13888072439409).

20012212212111 is a wasteful number, since it uses less digits than its factorization.

20012212212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53668852 (or 53668846 counting only the distinct ones).

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

Adding to 20012212212111 its reverse (11121221221002), we get a palindrome (31133433433113).

The spelling of 20012212212111 in words is "twenty trillion, twelve billion, two hundred twelve million, two hundred twelve thousand, one hundred eleven".