111202121121212 has 24 divisors (see below), whose sum is σ = 213230178604800. Its totient is φ = 50323747238960.

The previous prime is 111202121121193. The next prime is 111202121121227. The reversal of 111202121121212 is 212121121202111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5566776212 + ... + 5566796187.

It is an arithmetic number, because the mean of its divisors is an integer number (8884590775200).

Almost surely, 2^{111202121121212} is an apocalyptic number.

It is an amenable number.

111202121121212 is a deficient number, since it is larger than the sum of its proper divisors (102028057483588).

111202121121212 is a wasteful number, since it uses less digits than its factorization.

111202121121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11133572641 (or 11133572639 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111202121121212 its reverse (212121121202111), we get a palindrome (323323242323323).

The spelling of 111202121121212 in words is "one hundred eleven trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".