1212211100011 has 16 divisors (see below), whose sum is σ = 1271392241760. Its totient is φ = 1154193788160.

The previous prime is 1212211100003. The next prime is 1212211100017. The reversal of 1212211100011 is 1100011122121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1212211100011 - 2³ = 1212211100003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212211099964 and 1212211100000.

It is not an unprimeable number, because it can be changed into a prime (1212211100017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14313156 + ... + 14397598.

It is an arithmetic number, because the mean of its divisors is an integer number (79462015110).

Almost surely, 2^{1212211100011} is an apocalyptic number.

1212211100011 is a deficient number, since it is larger than the sum of its proper divisors (59181141749).

1212211100011 is an equidigital number, since it uses as much as digits as its factorization.

1212211100011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91326.

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

Adding to 1212211100011 its reverse (1100011122121), we get a palindrome (2312222222132).

The spelling of 1212211100011 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred thousand, eleven".