121220021020011 has 8 divisors (see below), whose sum is σ = 161628068711424. Its totient is φ = 80812660337640.

The previous prime is 121220021020003. The next prime is 121220021020019. The reversal of 121220021020011 is 110020120022121.

It is an interprime number because it is at equal distance from previous prime (121220021020003) and next prime (121220021020019).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121220021020011 - 2³ = 121220021020003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121220021020019) 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 7 ways as a sum of consecutive naturals, for example, 171340411 + ... + 172046436.

It is an arithmetic number, because the mean of its divisors is an integer number (20203508588928).

Almost surely, 2^{121220021020011} is an apocalyptic number.

121220021020011 is a deficient number, since it is larger than the sum of its proper divisors (40408047691413).

121220021020011 is a wasteful number, since it uses less digits than its factorization.

121220021020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343504521.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121220021020011 its reverse (110020120022121), we get a palindrome (231240141042132).

The spelling of 121220021020011 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty-one million, twenty thousand, eleven".