121220020121 has 8 divisors (see below), whose sum is σ = 127928049600. Its totient is φ = 114544793520.

The previous prime is 121220020109. The next prime is 121220020171. The reversal of 121220020121 is 121020022121.

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

It is a cyclic number.

It is not a de Polignac number, because 121220020121 - 2¹⁰ = 121220019097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121220020096 and 121220020105.

It is not an unprimeable number, because it can be changed into a prime (121220020171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8193125 + ... + 8207906.

It is an arithmetic number, because the mean of its divisors is an integer number (15991006200).

Almost surely, 2^121220020121 is an apocalyptic number.

It is an amenable number.

121220020121 is a deficient number, since it is larger than the sum of its proper divisors (6708029479).

121220020121 is a wasteful number, since it uses less digits than its factorization.

121220020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16401439.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121220020121 its reverse (121020022121), we get a palindrome (242240042242).

It can be divided in two parts, 1212200 and 20121, that added together give a palindrome (1232321).

The spelling of 121220020121 in words is "one hundred twenty-one billion, two hundred twenty million, twenty thousand, one hundred twenty-one".