121220111102 has 4 divisors (see below), whose sum is σ = 181830166656. Its totient is φ = 60610055550.

The previous prime is 121220111101. The next prime is 121220111119. The reversal of 121220111102 is 201111022121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201111022121 = 41 ⋅4905146881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111101) 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 as a sum of consecutive naturals, namely, 30305027774 + ... + 30305027777.

It is an arithmetic number, because the mean of its divisors is an integer number (45457541664).

Almost surely, 2^121220111102 is an apocalyptic number.

121220111102 is a deficient number, since it is larger than the sum of its proper divisors (60610055554).

121220111102 is an equidigital number, since it uses as much as digits as its factorization.

121220111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60610055553.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121220111102 its reverse (201111022121), we get a palindrome (322331133223).

The spelling of 121220111102 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, one hundred two".