121436111212 has 24 divisors (see below), whose sum is σ = 229231348416. Its totient is φ = 55956582528.

The previous prime is 121436111131. The next prime is 121436111227. The reversal of 121436111212 is 212111634121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1860388 + ... + 1924555.

It is an arithmetic number, because the mean of its divisors is an integer number (9551306184).

Almost surely, 2^121436111212 is an apocalyptic number.

It is an amenable number.

121436111212 is a deficient number, since it is larger than the sum of its proper divisors (107795237204).

121436111212 is a wasteful number, since it uses less digits than its factorization.

121436111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785577 (or 3785575 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

Adding to 121436111212 its reverse (212111634121), we get a palindrome (333547745333).

The spelling of 121436111212 in words is "one hundred twenty-one billion, four hundred thirty-six million, one hundred eleven thousand, two hundred twelve".