1213212331011 has 16 divisors (see below), whose sum is σ = 1629280696320. Its totient is φ = 802992734880.

The previous prime is 1213212331003. The next prime is 1213212331069. The reversal of 1213212331011 is 1101332123121.

It is not a de Polignac number, because 1213212331011 - 2³ = 1213212331003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213212351011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1788205 + ... + 2371518.

It is an arithmetic number, because the mean of its divisors is an integer number (101830043520).

Almost surely, 2^{1213212331011} is an apocalyptic number.

1213212331011 is a deficient number, since it is larger than the sum of its proper divisors (416068365309).

1213212331011 is a wasteful number, since it uses less digits than its factorization.

1213212331011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160426.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1213212331011 its reverse (1101332123121), we get a palindrome (2314544454132).

The spelling of 1213212331011 in words is "one trillion, two hundred thirteen billion, two hundred twelve million, three hundred thirty-one thousand, eleven".