1212212210111 has 16 divisors (see below), whose sum is σ = 1432000155648. Its totient is φ = 1004168188800.

The previous prime is 1212212210107. The next prime is 1212212210113. The reversal of 1212212210111 is 1110122122121.

It is not a de Polignac number, because 1212212210111 - 2² = 1212212210107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212212210111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212212210113) 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, 3598010 + ... + 3920471.

It is an arithmetic number, because the mean of its divisors is an integer number (89500009728).

Almost surely, 2^{1212212210111} is an apocalyptic number.

1212212210111 is a deficient number, since it is larger than the sum of its proper divisors (219787945537).

1212212210111 is an equidigital number, since it uses as much as digits as its factorization.

1212212210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7519262.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1212212210111 its reverse (1110122122121), we get a palindrome (2322334332232).

It can be divided in two parts, 121221 and 2210111, that added together give a palindrome (2331332).

The spelling of 1212212210111 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred ten thousand, one hundred eleven".