1212212222011 has 12 divisors (see below), whose sum is σ = 1411328693640. Its totient is φ = 1038151689120.

The previous prime is 1212212221973. The next prime is 1212212222017. The reversal of 1212212222011 is 1102222122121.

It is not a de Polignac number, because 1212212222011 - 2³³ = 1203622287419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212212222011.

It is not an unprimeable number, because it can be changed into a prime (1212212222017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10505826 + ... + 10620583.

It is an arithmetic number, because the mean of its divisors is an integer number (117610724470).

Almost surely, 2^{1212212222011} is an apocalyptic number.

1212212222011 is a deficient number, since it is larger than the sum of its proper divisors (199116471629).

1212212222011 is a wasteful number, since it uses less digits than its factorization.

1212212222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21127594 (or 21127587 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212212222011 its reverse (1102222122121), we get a palindrome (2314434344132).

The spelling of 1212212222011 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred twenty-two thousand, eleven".