121220101220001 has 16 divisors (see below), whose sum is σ = 186442665698304. Its totient is φ = 68621258900304.

The previous prime is 121220101219991. The next prime is 121220101220059. The reversal of 121220101220001 is 100022101022121.

It is not a de Polignac number, because 121220101220001 - 2⁵ = 121220101219969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121220101210001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26973763045 + ... + 26973767538.

It is an arithmetic number, because the mean of its divisors is an integer number (11652666606144).

Almost surely, 2^{121220101220001} is an apocalyptic number.

It is an amenable number.

121220101220001 is a deficient number, since it is larger than the sum of its proper divisors (65222564478303).

121220101220001 is a wasteful number, since it uses less digits than its factorization.

121220101220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53947530700.

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

Adding to 121220101220001 its reverse (100022101022121), we get a palindrome (221242202242122).

The spelling of 121220101220001 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred one million, two hundred twenty thousand, one".