121201020121 has 8 divisors (see below), whose sum is σ = 128113833600. Its totient is φ = 114341587920.

The previous prime is 121201020113. The next prime is 121201020169. The reversal of 121201020121 is 121020102121.

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 121201020121 - 2³ = 121201020113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121201020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13340650 + ... + 13349731.

It is an arithmetic number, because the mean of its divisors is an integer number (16014229200).

Almost surely, 2^121201020121 is an apocalyptic number.

It is an amenable number.

121201020121 is a deficient number, since it is larger than the sum of its proper divisors (6912813479).

121201020121 is a wasteful number, since it uses less digits than its factorization.

121201020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26690639.

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

Adding to 121201020121 its reverse (121020102121), we get a palindrome (242221122242).

The spelling of 121201020121 in words is "one hundred twenty-one billion, two hundred one million, twenty thousand, one hundred twenty-one".