121222112113 has 4 divisors (see below), whose sum is σ = 121223027200. Its totient is φ = 121221197028.

The previous prime is 121222112111. The next prime is 121222112119. The reversal of 121222112113 is 311211222121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 121222112113 - 2¹ = 121222112111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222112111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216513 + ... + 537886.

It is an arithmetic number, because the mean of its divisors is an integer number (30305756800).

Almost surely, 2^121222112113 is an apocalyptic number.

It is an amenable number.

121222112113 is a deficient number, since it is larger than the sum of its proper divisors (915087).

121222112113 is an equidigital number, since it uses as much as digits as its factorization.

121222112113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915086.

The product of its digits is 96, while the sum is 19.

Adding to 121222112113 its reverse (311211222121), we get a palindrome (432433334234).

It can be divided in two parts, 12122211 and 2113, that added together give a square (12124324 = 3482²).

The spelling of 121222112113 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, one hundred thirteen".