1212123330011 has 16 divisors (see below), whose sum is σ = 1373145274368. Its totient is φ = 1059998577600.

The previous prime is 1212123329999. The next prime is 1212123330013. The reversal of 1212123330011 is 1100333212121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1212123330011 - 2³⁴ = 1194943460827 is a prime.

It is a super-2 number, since 2×1212123330011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212123330013) 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, 10585610 + ... + 10699503.

It is an arithmetic number, because the mean of its divisors is an integer number (85821579648).

Almost surely, 2^{1212123330011} is an apocalyptic number.

1212123330011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212123330011 is a deficient number, since it is larger than the sum of its proper divisors (161021944357).

1212123330011 is a wasteful number, since it uses less digits than its factorization.

1212123330011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21285322.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1212123330011 its reverse (1100333212121), we get a palindrome (2312456542132).

The spelling of 1212123330011 in words is "one trillion, two hundred twelve billion, one hundred twenty-three million, three hundred thirty thousand, eleven".