1212122121011 has 32 divisors (see below), whose sum is σ = 1304115240960. Its totient is φ = 1124453145600.

The previous prime is 1212122120999. The next prime is 1212122121013. The reversal of 1212122121011 is 1101212212121.

It is a cyclic number.

It is not a de Polignac number, because 1212122121011 - 2³⁰ = 1211048379187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212122121013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 279481835 + ... + 279486171.

It is an arithmetic number, because the mean of its divisors is an integer number (40753601280).

Almost surely, 2^{1212122121011} is an apocalyptic number.

1212122121011 is a deficient number, since it is larger than the sum of its proper divisors (91993119949).

1212122121011 is a wasteful number, since it uses less digits than its factorization.

1212122121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8195.

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

Adding to 1212122121011 its reverse (1101212212121), we get a palindrome (2313334333132).

The spelling of 1212122121011 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, eleven".