212000121111 has 16 divisors (see below), whose sum is σ = 290615123808. Its totient is φ = 137367388800.

The previous prime is 212000121107. The next prime is 212000121121. The reversal of 212000121111 is 111121000212.

It is not a de Polignac number, because 212000121111 - 2² = 212000121107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212000121121) 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, 910380 + ... + 1119281.

It is an arithmetic number, because the mean of its divisors is an integer number (18163445238).

Almost surely, 2^212000121111 is an apocalyptic number.

212000121111 is a deficient number, since it is larger than the sum of its proper divisors (78615002697).

212000121111 is a wasteful number, since it uses less digits than its factorization.

212000121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030642.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 212000121111 its reverse (111121000212), we get a palindrome (323121121323).

The spelling of 212000121111 in words is "two hundred twelve billion, one hundred twenty-one thousand, one hundred eleven".