121220120011 has 4 divisors (see below), whose sum is σ = 121317175000. Its totient is φ = 121123065024.

The previous prime is 121220119987. The next prime is 121220120027. The reversal of 121220120011 is 110021022121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110021022121 = 29 ⋅3793828349.

It is a cyclic number.

It is not a de Polignac number, because 121220120011 - 2⁷ = 121220119883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121220119973 and 121220120000.

It is not an unprimeable number, because it can be changed into a prime (121220120051) 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, 48525621 + ... + 48528118.

It is an arithmetic number, because the mean of its divisors is an integer number (30329293750).

Almost surely, 2^121220120011 is an apocalyptic number.

121220120011 is a deficient number, since it is larger than the sum of its proper divisors (97054989).

121220120011 is an equidigital number, since it uses as much as digits as its factorization.

121220120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97054988.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121220120011 its reverse (110021022121), we get a palindrome (231241142132).

The spelling of 121220120011 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, eleven".