1212211000111 has 4 divisors (see below), whose sum is σ = 1213515856800. Its totient is φ = 1210906143424.

The previous prime is 1212211000109. The next prime is 1212211000153. The reversal of 1212211000111 is 1110001122121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212211000111 - 2¹ = 1212211000109 is a prime.

It is a super-2 number, since 2×1212211000111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212211000091 and 1212211000100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212211000171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652426951 + ... + 652428808.

It is an arithmetic number, because the mean of its divisors is an integer number (303378964200).

Almost surely, 2^{1212211000111} is an apocalyptic number.

1212211000111 is a deficient number, since it is larger than the sum of its proper divisors (1304856689).

1212211000111 is an equidigital number, since it uses as much as digits as its factorization.

1212211000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304856688.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1212211000111 its reverse (1110001122121), we get a palindrome (2322212122232).

The spelling of 1212211000111 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred eleven", and thus it is an aban number.