212212211022111 has 32 divisors (see below), whose sum is σ = 284306312429568. Its totient is φ = 140798440823040.

The previous prime is 212212211022107. The next prime is 212212211022137. The reversal of 212212211022111 is 111220112212212.

It is not a de Polignac number, because 212212211022111 - 2² = 212212211022107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212211022311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 929731746 + ... + 929959968.

It is an arithmetic number, because the mean of its divisors is an integer number (8884572263424).

Almost surely, 2^{212212211022111} is an apocalyptic number.

212212211022111 is a deficient number, since it is larger than the sum of its proper divisors (72094101407457).

212212211022111 is a wasteful number, since it uses less digits than its factorization.

212212211022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230391.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212212211022111 its reverse (111220112212212), we get a palindrome (323432323234323).

The spelling of 212212211022111 in words is "two hundred twelve trillion, two hundred twelve billion, two hundred eleven million, twenty-two thousand, one hundred eleven".