121220111203101 has 64 divisors (see below), whose sum is σ = 192764413267200. Its totient is φ = 75019798315008.

The previous prime is 121220111203091. The next prime is 121220111203109. The reversal of 121220111203101 is 101302111022121.

It is a happy number.

121220111203101 is a `hidden beast` number, since 1 + 2 + 1 + 220 + 11 + 120 + 310 + 1 = 666.

It is not a de Polignac number, because 121220111203101 - 2¹⁰ = 121220111202077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111203109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5857821 + ... + 16635933.

It is an arithmetic number, because the mean of its divisors is an integer number (3011943957300).

Almost surely, 2^{121220111203101} is an apocalyptic number.

It is an amenable number.

121220111203101 is a deficient number, since it is larger than the sum of its proper divisors (71544302064099).

121220111203101 is a wasteful number, since it uses less digits than its factorization.

121220111203101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10778475 (or 10778469 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 121220111203101 its reverse (101302111022121), we get a palindrome (222522222225222).

The spelling of 121220111203101 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred three thousand, one hundred one".