121111113311212 has 12 divisors (see below), whose sum is σ = 212489292637440. Its totient is φ = 60399886843376.

The previous prime is 121111113311147. The next prime is 121111113311213. The reversal of 121111113311212 is 212113311111121.

It is not an unprimeable number, because it can be changed into a prime (121111113311213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38917451308 + ... + 38917454419.

It is an arithmetic number, because the mean of its divisors is an integer number (17707441053120).

Almost surely, 2^{121111113311212} is an apocalyptic number.

It is an amenable number.

121111113311212 is a deficient number, since it is larger than the sum of its proper divisors (91378179326228).

121111113311212 is a wasteful number, since it uses less digits than its factorization.

121111113311212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77834906120 (or 77834906118 counting only the distinct ones).

The product of its digits is 72, while the sum is 22.

Adding to 121111113311212 its reverse (212113311111121), we get a palindrome (333224424422333).

The spelling of 121111113311212 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred thirteen million, three hundred eleven thousand, two hundred twelve".