1212122011011 has 16 divisors (see below), whose sum is σ = 1653800353920. Its totient is φ = 789263697600.

The previous prime is 1212122010959. The next prime is 1212122011013. The reversal of 1212122011011 is 1101102212121.

It is a happy number.

It is not a de Polignac number, because 1212122011011 - 2⁹ = 1212122010499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212122011013) 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, 4487100 + ... + 4749558.

It is an arithmetic number, because the mean of its divisors is an integer number (103362522120).

Almost surely, 2^{1212122011011} is an apocalyptic number.

1212122011011 is a deficient number, since it is larger than the sum of its proper divisors (441678342909).

1212122011011 is a wasteful number, since it uses less digits than its factorization.

1212122011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298306.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212122011011 its reverse (1101102212121), we get a palindrome (2313224223132).

The spelling of 1212122011011 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, eleven thousand, eleven".