1212112220011 has 16 divisors (see below), whose sum is σ = 1539718149888. Its totient is φ = 926682213600.

The previous prime is 1212112219999. The next prime is 1212112220063. The reversal of 1212112220011 is 1100222112121.

It is not a de Polignac number, because 1212112220011 - 2⁹ = 1212112219499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212112220611) 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, 148502685 + ... + 148510846.

It is an arithmetic number, because the mean of its divisors is an integer number (96232384368).

Almost surely, 2^{1212112220011} is an apocalyptic number.

1212112220011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212112220011 is a deficient number, since it is larger than the sum of its proper divisors (327605929877).

1212112220011 is a wasteful number, since it uses less digits than its factorization.

1212112220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297013602.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212112220011 its reverse (1100222112121), we get a palindrome (2312334332132).

The spelling of 1212112220011 in words is "one trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty thousand, eleven".